Spaihts has always been the original creator of Prometheus, he's been overshadowed by Lindelof for the past year, and he himself wasn't too happy with it. He really deserves all the promotion and the correct credit. I read his scripts, Passengers, Shadow 19, and his draft for The Darkest Hour (which the film mangled)
He's a smart man, he has a degree from Princeton and has written a few textbooks on Biology. You can tell his experience and passion lies in sci-fi, biology, engineering and Lindelof got all the credit but it was obvious he wasnt the dude that came up with most of the ideas.