What exactly is your point here? Did He or did He not disclose that to Noah before the fact? Obviously, God didn't cause the flood to happen first then tell Noah after the fact---Btw, Noah, For after seven more days I will cause it to rain on the earth forty days and forty nights, and I will destroy from the face of the earth all living things that I have made. My bad, I should have told you before the fact rather than after the fact.
That's the point I basically see
@SuperCow making, since I fully agree that prophecies are not prophecies unless they predict the future. And if Revelation was written after 70 AD, but that some of you allege much of it is in involving 70 AD, this would be an example of a prophecy not predicting the future if 70 AD is already in the past when Revelation is initially written. Therefore, totally useless if the idea is to warn someone in the first century about this upcoming 70 AD event, except when Revelation is initially written, 70 AD is already in the past.
I don't know if Revelation was written before 70 AD or after 70 AD. Obviously, no one today can know that for certain. Therefore, it's 50/50 odds that it was written before 70 AD and it is also 50/50 odds that it was written after 70 AD. Even if it was written before 70 AD, that alone hardly undeniably proves that any of the events recorded in Revelation are involving 70 AD.