Matthew 19:28 "And Jesus said unto them, Verily I say unto you, That ye which have followed me, in the regeneration when the Son of man shall sit in the throne of his glory, ye also shall sit upon twelve thrones, judging the twelve tribes of Israel."
Acts 1:9 "And when he had spoken these things, while they beheld, he was taken up; and a cloud received him out of thier sight.
10 And while they looked stedfastly toward heaven as he went up, behold two men stood by them in white apparel;
11 Which also said, Ye men of Galilee, why stand ye gazing up into heaven? this same Jesus which is taken up from you into heaven, shall so come in like manner as ye have seen him go into heaven.
Psalms 110:1 "The Lord said unto my Lord, Sit thou at my right hand UNTIL I make thine enemies thy footstool."
Luke 21:27 "And then shall they see the Son of man coming in a cloud with power and great glory."
Looks to me like Jesus will return from heaven to establish His long promised kingdom upon David's throne (2Sam.7:13-16) upon the earth. The 12 disciples will then be sitting upon thrones judging the 12 tribes of Israel, while I will be in heaven "...to ever be with the Lord" (1Thess.4:17) (see also 2Cor.5:1).