I was looking at this myself, and I do realize, that Isaiah is quoted, even though the same words can be found in Malichi in respects to sending "my messenger" (before me). And so I have been looking at these things, this is as far as I have gotten. I have other smaller things but these are a few I was looking at in making comparisons between Elijah and John, seems quite a few matches, yet still some other questions, I am hoping as I continue I will have more to add.
I'll just start from here though...
Mal 3:1 Behold, I will send my messenger, and he shall prepare the way before me.
John 1:6 There was a man sent from God, whose name was John.
Matthew 11:10 For this is he, of whom it is written, Behold, I send my messenger before thy face, which shall prepare thy way before thee.
The birth of John was on this wise
Luke 1:13 But the angel said unto him, Fear not, Zacharias: for thy prayer is heard; and thy wife Elisabeth shall bear thee a son, and thou shalt call his name John.
Luke 1:14 And thou shalt have joy and gladness; and many shall rejoice at his birth. For he shall be great in the sight of the Lord,
Luke 7:28 For I say unto you, Among those that are born of women there is not a greater prophet than John the Baptist: but he that is least in the kingdom of God is greater than he.
Luke 1:15 And shall drink neither wine nor strong drink; and he shall be filled with the Holy Ghost, even from his mother's womb. And many of the children of Israel shall he turn to the Lord their God.
Luke 1:16 And he shall go before him in the spirit and power of Elias, to turn the hearts of the fathers to the children, and the disobedient to the wisdom of the just; to make ready a people prepared for the Lord.
Matthew 11:14 And if ye will receive it, this is Elias, which was for to come.
Mal 4:5-6 Behold, I will send you Elijah the prophet before the coming of the great and dreadful day of the LORD: And he shall turn the heart of the fathers to the children, and the heart of the children to their fathers, lest I come and smite the earth with a curse.
Mal 4:1 For, behold, the day cometh, that shall burn as an oven; and all the proud, yea, and all that do wickedly, shall be stubble: and the day that cometh shall burn them up, saith the LORD of hosts, that it shall leave them neither root nor branch.
Mat 3:7-8 But when he saw many of the Pharisees and Sadducees come to his baptism, he said unto them, O generation of vipers, who hath warned you to flee from the wrath to come? Bring forth therefore fruits meet for repentance:
Mat 3: 9-10 And think not to say within yourselves, We have Abraham to our father: for I say unto you, that God is able of these stones to raise up children unto Abraham. And now also the ax is laid unto the root of the trees: therefore every tree which bringeth not forth good fruit is hewn down, and cast into the fire.
Mat 3:12 Whose fan is in his hand, and he will thoroughly purge his floor, and gather his wheat into the garner; but he will burn up the chaff with unquenchable fire.
Mal 3:5 And I will come near to you to judgment; and I will be a swift witness against the sorcerers, and against the adulterers, and against false swearers, and against those that oppress the hireling in his wages, the widow, and the fatherless, and that turn aside the stranger from his right, and fear not me, saith the LORD of hosts.
Matthew 23:14 Woe unto you, scribes and Pharisees, hypocrites! for ye devour widows' houses, and for a pretence make long prayer: therefore ye shall receive the greater damnation
James 1:27 Pure religion and undefiled before God and the Father is this, To visit the fatherless and widows in their affliction, and to keep himself unspotted from the world.
Luke 19: 43 For the days shall come upon thee, that thine enemies shall cast a trench about thee, and compass thee round, and keep thee in on every side, And shall lay thee even with the ground, and thy children within thee; and they shall not leave in thee one stone upon another; because thou knewest not the time of thy visitation.
John come baptizing that he might be revealed to Israel, both having part in fulfulling righteousss... For thus it becometh us to fulfil all righteousness.
Mat 17:12 But I say unto you,That Elijah is come already, and they knew him not, but have done unto him whatsoever they listed. Likewise shall also the Son of man suffer of them.
Mat 17:13 Then the disciples understood that he spake unto them of John the Baptist.
Heb 10:1 For the law having a shadow of good things to come, and not the very image of the things
Whereas it also says...
Mat 11:13 For all the prophets and the law prophesied until John.
Mat 11:14 And if ye will receive it, this is Elijah, which was for to come.
Luke 1:17 And he shall go before him in the spirit and power of Elijahs, to turn the hearts of the fathers to the children, and the disobedient to the wisdom of the just; to make ready a people prepared for the Lord.
He shall go "before him" (the Lord) and John's testimony was of "he cometh after me" (the Lord)
Mat 3:11 I indeed baptize you with water unto repentance: but he that cometh after me is mightier than I, whose shoes I am not worthy to bear: he shall baptize you with the Holy Ghost, and with fire:
Whereas here...
Mal 4:6 And he shall turn the heart of the fathers to the children, and the heart of the children to their fathers, lest I come and smite the earth with a curse.
Then we have...
Mat 21:32 For John came unto you in the way of righteousness, and ye believed him not: but the publicans and the harlots believed him: and ye, when ye had seen it, repented not afterward, that ye might believe him.
Then of this part...
Lest I come and smite the earth with a curse.
The only one I see cursing is Elisha (which come after Elijah) those children
Whereas again
He shall go "before him" (the Lord) and John's testimony was of "he cometh after me" (the Lord)
2Kings 1:7 And he said unto them, What manner of man was he which came up to meet you, and told you these words?
2Kings 1:8 And they answered him, He was an hairy man, and girt with a girdle of leather about his loins. And he said, It is Elijah the Tishbite.
Mark 1:6 And John was clothed with camel's hair, and with a girdle of a skin about his loins; and he did eat locusts and wild honey;
Luke 7:24 And when the messengers of John were departed, he began to speak unto the people concerning John, What went ye out into the wilderness for to see? A reed shaken with the wind?
Luke 7:25 But what went ye out for to see? A man clothed in soft raiment? Behold, they which are gorgeously apparelled, and live delicately, are in kings' courts.
Luke 7:26 But what went ye out for to see? A prophet? Yea, I say unto you, and much more than a prophet.
Luke 7:27 This is he, of whom it is written, Behold, I send my messenger before thy face, which shall prepare thy way before thee.
Luke 1:76 And thou, child, shalt be called the prophet of the Highest: for thou shalt go before the face of the Lord to prepare his ways;
John 3:28 Ye yourselves bear me witness, that I said, I am not the Christ, but that I am sent before him.
Isaiah 40:1 The voice of him that crieth in the wilderness, Prepare ye the way of the LORD, make straight in the desert a highway for our God.
Prov 16:17 The highway of the upright is to depart from evil: he that keepeth his way preserveth his soul.
Mat 3:1 In those days came John the Baptist, preaching in the wilderness of Judaea,
Mat 3:3 For this is he that was spoken of by the prophet Esaias, saying, The voice of one crying in the wilderness, Prepare ye the way of the Lord, make his paths straight.
Mat 21:32 For John came unto you in the way of righteousness, and ye believed him not: but the publicans and the harlots believed him: and ye, when ye had seen it, repented not afterward, that ye might believe him.
Mal 4:6 And he shall turn the heart of the fathers to the children, and the heart of the children to their fathers, lest I come and smite the earth with a curse.
John said...
Mat 3:8 Bring forth therefore fruits meet for repentance:
Hebrews said...
Heb 6:7 For the earth which drinketh in the rain that cometh oft upon it, and bringeth forth herbs meet for them by whom it is dressed, receiveth blessing from God:
Wheres of these...
Luke 7:30 But the Pharisees and lawyers rejected the counsel of God against themselves, being not baptized of him.
Heb 6:8 But that which beareth thorns and briers is rejected, and is nigh unto cursing; whose end is to be burned.
Again...
Mal 4:6 And he shall turn the heart of the fathers to the children, and the heart of the children to their fathers, lest I come and smite the earth with a curse.
And Elisha who followed after Elijah and who received a double portion of the Spirit of Elijah was the one who cursed the children of the city
2Kings 2:24 And he turned back, and looked on them, and cursed them in the name of the LORD. And there came forth two she bears out of the wood, and tare forty and two children of them.
These two bear witness of each other this way
Luke 1:15 For he shall be great in the sight of the Lord, and shall drink neither wine nor strong drink; and he shall be filled with the Holy Ghost, even from his mother's womb.
Luke 7:28 For I say unto you, Among those that are born of women there is not a greater prophet than John the Baptist: but he that is least in the kingdom of God is greater than he.
Luke 7:33 For John the Baptist came neither eating bread nor drinking wine; and ye say, He hath a devil.
Luke 7:34 The Son of man is come eating and drinking; and ye say, Behold a gluttonous man, and a winebibber, a friend of publicans and sinners!
Luke 7:35 But wisdom is justified of all her children.
Mat 11:14 And if ye will receive it, this is Elias, which was for to come.
Mat 17:12 But I say unto you, that Elias is come already, and they knew him not, but have done unto him whatsoever they listed. Likewise shall also the Son of man suffer of them.
Mat 17:13 Then the disciples understood that he spake unto them of John the Baptist.
These (and others) are what I have been looking at, however I am not finished, just a few that seem comparable and I go back in and add to them. For instance Elijah and Elisha (they two) as John and Jesus (together) Jesus said were to fulfil all righteousness. Now John was filled with the Holy Ghost (by birth) but Jesus was conceived of the Holy Ghost. Yet Jesus come out to be baptized of John even as Elijah asked Elisha, "what is it that I can do for you"? And Elisha says, I want a "double portion" of your Spirit right? Whereas when Jesus come to John (to be baptized) John forbade Jesus (Knowing he was the Lords Christ). Jesus said to suffer it to be so for now for it becometh us to fulfil all righteousness. Then what happened at Johns baptism? The heavens opened and the Holy Ghost descended upon Jesus. John was born filled with the Holy Ghost (and Jesus conceived of the same. The double portion of thy Spirit (the Holy Ghost John was filled with from the womb) is shown descending upon Jesus (or Johns baptism) the Elijah for to come. Like, "heres the sign" . Theres a few other cool comparisons in their order, but dead men coming to life is in touching the bones of Elisha too. Likewise the lepers being cleansed as shown in Namaan. More then I can fit on one post. However they do seem to show a patern between them.
For instance here...
For the law having a shadow of good things to come, and not the very image of the things
So of John (Jesus said)
If ye will receive it, this is Elijah, which was for to come.
Because Jesus also said....
For all the prophets and the law prophesied "until John"
Even Jesus says, it "becometh us" to fulfil all righteousness, speaking of the two together (in that sense).
Which is interesting (keeping in mind Elijah being before Elisha) and John before Jesus because here it says...
And it came to pass, when they were gone over, that Elijah said unto Elisha, Ask what I shall do for thee, before I be taken away from thee.
And Elisha (who follows after Elijah) says
I pray thee, let a double portion of thy spirit be upon me.
Yet of John we know... He shall be filled with the Holy Ghost, even from his mother's womb.
But Jesus Christ was actually conceived of the Holy Ghost
And its right here (specifically so) John forbids Jesus
But John forbad him, saying, I have need to be baptized of thee, and comest thou to me?
And, Jesus said
"Suffer it for now" in that it behooveth us (both) in fulfilling all righteousness (for John came in the way of righteousness)
"and then" John did suffer Him
And Jesus, when he was baptized, went up straightway out of the water:
And, lo, the heavens were opened unto him, and he (John) saw the Spirit of God descending like a dove, and lighting upon him: (the sign given to John so he would know)
And likewise ...
John bare witness of him, and cried, saying, This was he of whom I spake, He that cometh after me is preferred before me: for he was before me.
Whereas even here...
Again the next day after John stood, and two of his disciples;
And looking upon Jesus as he walked, he saith, Behold the Lamb of God!
And the two disciples heard him speak,
and they followed Jesus.
Whereas even here...
When the sons of the prophets which were to view at Jericho saw him, they said, The spirit of Elijah doth rest on Elisha.
And they came to meet him, and bowed themselves to the ground before him.
Likewise....As John points out Jesus (these hearing John) the Elijah for to come (Elisha coming after Elijah)
Jesus turns...
Then Jesus turned, and saw them following, and saith unto them,
What seek ye? They said unto him, Rabbi, (which is to say, being interpreted, Master,) where dwellest thou?
He saith unto them, Come and see.
And likewise...
And they (others) came unto John, and said unto him, Rabbi, he that was with thee beyond Jordan, to whom thou barest witness, behold, the same baptizeth, and all men come to him.
Ye yourselves bear me witness, that I said, I am not the Christ, but that I am sent before him.
And he shall go before him in the spirit and power of Elias, to turn the hearts of the fathers to the children, and the disobedient to the wisdom of the just; to make ready a people prepared for the Lord.
Then after the vision on the mount, where Elias and Moses appeared, he tells them not to tell the vision to any man until he is risen from the dead, which causes them to ask...
His disciples asked him, saying, Why then say the scribes that Elias must first come?
And Jesus answered and said unto them, Elias truly shall first come, and restore all things.
But I say unto you, That Elias is come already, and they knew him not, but have done unto him whatsoever they listed. Likewise shall also the Son of man suffer of them.
Then the disciples understood that he spake unto them of John the Baptist.
Jesus saying...
If ye will receive it, this is Elijah, which was for to come.
And he shall turn the heart of the fathers to the children, and the heart of the children to their fathers,
lest I come and smite the earth with a curse.
Whereas its Elisha (who follows after Elijah) who is shown turning back and cursing the mocking children of the city in the name of the LORD.
Thats what I am looking at, because it speaks of being nigh unto the cursing. I just find this so interesting, have to continue to look at this and add to it as I can though.
Maybe some of these can be helpful to someone, maybe not, like I said, Im still proving these out myself and its certainly not complete, I just have what I am seeing in part
Sis, too 
