Looks like Prometheus will have little to do with Alien after all and more about the Space Jockey and a new race called The Makers. Seems to be about the beginning of life for humans, that we were put on this planet (Earth) by The Makers and in their likeness.
From Ridley Scott
“So now you’ve got the whole changed attitude with NASA, the church and I think even [Stephen] Hawking. Over the last thirty years have gone from “It’s highly unlikely that there’s anyone else in our galaxy, any other force, being in our galaxy,” to now, where they’re conceding that there are probably thousands of different lifeforms in this galaxy. And I think Hawking actually said, “Let’s hope they don’t visit.” And I think the church has conceded as well that it would not be against the word of God if we conceded that there are other lifeforms in this galaxy.”
Pics below reveal another race called The Makers which have a stone human face, possibly our “God” our creators.
http://www.movieweb.com/news/prometheus-ew-photos-reveal-the-makers