They've already got it wrong SO many times. 44 failed & 1 ambiguous end-of-the-world predictions that were to occur between 30 & 1920 CE.
I'm not going to worry about the "end" of the world. Everything has an explanation and I think it has something to do with the sun and moon as the gravitational pull has a VERY powerful effect on our planet (think tides and strange animal behaviours etc...).
It is a bit bible heavy but makes interesting reading http://www.religioustolerance.org/end_wrl2.htm
So IMO if it's failed so many times before it is going to fail again