Well. We all know that games based directly on movies suck. Seeing the interest of the big money in backing the Prometheus franchise I consider it very likely we will see a game based on that IP not too soon. I think we can rule out action FPS or strategy game. Personally, I would love to see a new FPRPG/Adventure game with stealth and horror elements, combining aspects of Thief, Penumbra, Deus Ex and especially System Shock. That would be a perfect prototype for a Prometheus game. I think FP is absolutely neccesary for the "horror" aspect. Obsidian's cancelled Alien RPG might speak in their favour here - although if I recall correctly that was more inspired by "Aliens" :/