I asked Diane O'Bannon on FB about this a week ago, and she said that no-one had gotten in touch with her about it, but they should have, as FOX have an obligation to the original creators if it is Alien related.
Well, today we were discussing the naming of ALIENS, when she let in that:
I've been officially informed that PROMETHIUS is indeed taking off on the original ALIEN story.So there ya go