Maybe Llamatron's right. Perhaps we are next - but extinction will be self-inflicted in our case.
Luna, if, for example, we blew the earth to pieces, no one would be saved in the physical sense unless, as you say we find a nice cosy planet to hop on to - and then it will only be those important enough or rich enough to buy a ticket! Christians would be alright though, because although their bodies would be destroyed, their souls would be saved. Not much hope for the rest of us then, is there!
Jake, some Christians still believe wholeheartedly that human beings are alone in the universe and that the earth is a special place. According to them, it's the only planet that god has any interest in because he created the whole universe to enable the people of earth to tell the seasons - and to glorify himself. We've have discussions on this in recent weeks, and believe it or not, this is what they believe.
I really look forward to the day when science discovers intelligent life on other planets. Perhaps then we earthlings will get our act together and all the greed, selfishness and nonsensical religious fervour that goes on here will cease! Hallelujah to that!