Contradiction with Matthew 22:30
According to this verse, in the resurrection people will neither marry nor be given in marriage, seeming to contradict the imagery of a bride being prepared for her husband in Revelation 21:2.
Matthew 22:30: But as touching the resurrection of the dead, have ye not read that which was spoken unto you by God, saying,
Contradiction with Luke 17:20-21
Jesus states that the kingdom of God is within you, which could contradict the depiction of New Jerusalem descending from heaven in Revelation 21:2.
Luke 17:20-21: And when he was demanded of the Pharisees, when the kingdom of God should come, he answered them and said, The kingdom of God cometh not with observation: [with...: or, with outward shew]
Contradiction with John 18:36
Jesus says His kingdom is not of this world, which could be seen as contrasting with the physical descent of New Jerusalem in Revelation 21:2.
John 18:36: Jesus answered, My kingdom is not of this world: if my kingdom were of this world, then would my servants fight, that I should not be delivered to the Jews: but now is my kingdom not from hence.
Contradiction with Hebrews 12:22-23
This passage describes Mount Zion and the heavenly Jerusalem as something believers have already come to, contrasting with the future descent of New Jerusalem in Revelation 21:2.
Hebrews 12:22-23: But ye are come unto mount Sion, and unto the city of the living God, the heavenly Jerusalem, and to an innumerable company of angels,
Contradiction with Isaiah 65:17
This verse speaks of creating new heavens and a new earth, and the former not being remembered, which could contrast with the continuity implied by the new Jerusalem descending to the current creation in Revelation 21:2.
Isaiah 65:17: For, behold, I create new heavens and a new earth: and the former shall not be remembered, nor come into mind. [come...: Heb. come upon the heart]