Part of the fun of the movie is understanding exactly why we called it Prometheus. And also, it sounds really pretentious, like Inception, so we were just like, "Yeah, that makes the movie sound really smart!" It's so much better then my original title, Explosion. Well, there might be an explosion in the movie.
The fun thing about doing origin stories is you are introducing the audience to characters.
I think that we, as writers, get excited by risk. When we are feeling comfortable and familiar, I wouldn't say that we get bored, but the energy in the room gets flat. When we're most excited and when the show is the most fun, it's when we're duking things out.