Personally, I think the space Jockeys are human anyway, I just hope I'm wrong, but there's something about the way this is all unfolding. We know there won't be any Xeno's, and that's fair enough. But from what Scott stated on Alien Prequel News (on 17 Dec.), it seems his whole philosophy for Phometheus is not only built around the concept of God(s), but the very notion we are not only not alone in the universe, but there are mostly likely more of us out there. Of course, it would be truly niave to predict we are only indigenous to Earth, but do we really want to discover something more human about ourselves in this film??