It is known that the specifics of the story were modified.
The current text is kind of frozen by its own similarities to itself.
The use of extracted quotes is probably a mistake. You have to find the same event in a lot of other books beyond Matthew to be able to find a tiny whiff of historical information, very faint, very difficult to do with translated versions.
Luke 17:20-37 also seems to support the idea that Jesus was trying to tell people the kingdom was spiritual, not physical. The kingdom as a concept wasn't some novel idea, either. Jesus was claiming he was the fulfillment of the messianic prophecy in Judaism. He was reinterpreting the prophecy, though, as a spiritual rather than literal liberation.
Tangential, but you can interpret the anti-christ in christian belief to bring the alleged kingdom, as a sort of anti-fulfillment of the prophecy.
> You have to find the same event in a lot of other books beyond Matthew to be able to find a tiny whiff of historical information
The same event is described in the book of Mark (10:32-34) and the book of Luke (18:31-34).
There are two other predictions that appear in all three books:
Matthew 16:21-23
Mark 8:31-33
Luke 9:21-22
Matthew 17:22-23
Mark 9:30-32
Luke 9:43-45