The premise interests me, but it is hard to make a character knowing so little about the world other than the gods got angry at humans and they are now slaves. I think there is quite a few interesting character ideas I can make with this, the one that immediately jumps to mind with this premise is a crazy resistance priest (read crazy person who shouts about a religion that may or may not be completely made up) that believes that all of the old god forsaken humans except for one, and that humanity should now worship this one god. (I think this character would be best if the god is either completely fictional, there being some truth to his religion but most of is nonsense, or if it is ambiguous how true his believes actually are) 

Though that is just one idea that I am attach to, since I thought of this character as I was reading the original post, I am not opposed to doing something else.