There have been many predictions when the world will end, but none of them have become true.
Y2K wasn't a catastrophe. We're still here, alive and thriving.
The end of the world will be a gradual process most likely, there have been no signs yet of falling into mass anarchy.
Bush won't be president in 2012.
Research yourself when the next major asteroid will approach earth.
Research when global warming is supposed to end the world (which it kind of ridiculous); though environmental extremists may be predicting within the next 100 years, 4 years would be too quickly and very unrealistic.
If it took millions of years for the world to reach this state, what makes you think within 4 years everything could end?