There was a discussion about this on another forum I post at and my stance on that still holds. The end of the world in 2012 due to the comet will be because that comet coming is the one that brings King Ghidorah to Earth from outer space. He'll land in Japan somewhere and start smashing **** up, Godzilla will come out and go after him and the ensuing fight will end up destroying most of asia until King Ghidorah is dead. And then Godzilla will go on a rampage and destroy the rest of the world. And I will enjoy the spectacle, because tbf if your civilisation is going to be destroyed it may as well be by Godzilla, so much cooler than pollution and/or George Bush.