Book of Eli: Going to suck?

So, I just watched the Book of Eli trailer.  I'm not quite as psyched as I think I was expecting to be.  I wasn't sure at first what it was and then I realized that I want my post-apocalyptic heroes to be everyday types and not complete martial arts experts.  What's the story here, was he a ninja before the apocalypse or did he find some sort of Zombie Dojo? (Note: Excellent idea for a movie)  Anyway, if someone has more information, lemme know.  Until then, I'll just remain cautiously optimistic.