Yeah, that would be replacement theology, [but I don't concern myself either way with it.]
What about the OC earthly Levitical priesthood of OC Israel/Judah being replaced with the NC spiritual priesthood of Jesus?
Hebrews 7:12
For being translated/metatiqemenhV <3346> (5746) the Priesthood, out of necessity also of Law, a translation//metaqesiV <3331> is becoming,
Hebrews 8:
13 in the to be saying 'New' He hath made old the first.
The yet being aged and being obsolete[OC priesthood] nigh of disappearance
Did you ever read Josephus's account of the prophectic destruction of Jerusalem, the Temple and priesthood? Just as Hebrews 8 predicted.
[Makes me wonder how many Priests were in Jerusalem at that time]
The Destruction of Jerusalem - George Peter Holford, 1805AD
The Romans, exasperated to the highest pitch against the Jews, seized every person whom they could find, and, without the least regard to sex, .age or quality, first plundered and then slew them.
The old and the young, the common people and
the priests, those who surrendered and those who resisted, were equally involved in this horrible and
indiscriminate carnage.
The Temple now presented little more than a heap of ruins...
For five days after the destruction of the Temple,
the priests who had escaped, sat, pining with hunger, on the top of one of its broken walls; at length, they came down, and humbly asked the pardon of Titus, which, however, he refused to grant them, saying, that, "as the Temple, for the sake of which he would have spared them, was destroyed, it was but fit that its priests should parish also:" -whereupon he commanded
that they should be put to death.
http://www.bible.org/page.php?page_id=3974
Being closely associated with the Temple, the Sadducees disappeared from history when the Temple was destroyed in 70.
.