Reminds me of a story relating to the oracle at delphi. A king of a newly established empire (can't remember which one) wanted to invade the Persian Empire. Before the invasion, he went to the oracle to ask for advice. The oracle said something along the line of "if you invade Persia, a great empire will fall." The king went back to his army with a big smile on his face.
It turned out that the invasion was a complete failure and the Persians took the opportunity to invade his country. While fighting for his country's survival, he sent a messenger to the oracle at delphi to ask why she said Persia was going to fall. The oracle's priest answered, "the oracle really meant your empire, not Persia."
So you see, the prophecies in the past had been so vague that nobody knows what the hell they mean and anybody could interpret them anyway he wanted to. If he got it wrong, well, it's his fault for misinterpreting the prophecy. If he got it right, well, Halleluiah!
For once, I'd like to see an actual date, like when the next 8.0 earthquake is going to take place.