Hey Guys, a bit late but here's a sketch. I liked Nic's way of approaching it so I've tried something similar. The last human alive could easily be an alien too, or of course just a beautiful woman (two nude chicks=win)
Tim, your nicely done sketch explains the whole story but I think it's gonna be tough too get all of this in a solid design.
I don't know if you guys have time this weekend to work on it some more, maybe we could get a more definite design on sunday.