Could this really have happened?

I don't think Matthew has a track record of making up prophecies. You may think he has a track record of making up the fulfillment of the prophecies, but of making up the prophecies themselves? It seems unlikely. It seems much more likely that it's from some source we don't have.

That might be an interesting thread, and it might not.For the most part they ignore it and say "so what?" However, I got a pretty interesting dance from my Greek teacher (I just had one semester) when I asked him about Jude's reference to Enoch. That one's not a passing reference; it's a quote from the Book of Enoch referred to as prophecy and attributed to Enoch.