Meteor hitting the Earth is the only one that's remotely plausible.

A tsunami can't possibly destroy the Earth. Tsunamis are local events whose devastation is confined to coastal regions.

Global Warming is not likely to have that big of an impact by 2010, and even in the long run isn't a threat to the survival of the planet as a whole.

In the highly unlikely event that we're contacted by an extraterrestrial species in the next few years, they'd have to be a species that developed interstellar flight before killing itself off, and I have a hard time believing a species that did that would just annihilate us on first glance. I mean, if we discovered some kind of primitive intelligent life on Mars, would we just nuke the hell out of them? I'd like to think we'd try to study and conserve them.

Kraloth isn't going to destroy the world. Even if he tried, nobody would know what the hell he's talking about. "ia m giong ot dsetryo u all u coksjuckrz an dbeat u wiht a can of larger"

Return of Jesus. I'm not too worried about dead people coming back to life. And besides, how much damage could one zombie do, even if it was the son of God?