SPOILERS: One of my theories, thoughts?

Hey everyone:) I'm new! I did make an introduction thread on the community discussions, so that'll answer why you haven't seen me before! Anyway, I've got a few theories, here's one. The Engineers created our race and many others as a test, and because we come from the Engineers, I wouldn't be surprised if they made thousands of other species. They laid out 'invitations' for us to find them a long time ago, they did this to see if we could find them, a test, because only then if we were able to create that kind of technology to go all that way, it's then we could become a threat to them. One thing that I think is fishy about the movie, and that kind've backs this up, is the hologram right? Showing the Engies running from 'something'. Why? why was it recorded, it seemed a bit silly, although to me it seemed like a massive hin! "Hey guys, you've gotten this far, here's a hint, you'll follow these guys into this room and meet similar dooms. After getting into that room (if I can remember correctly) David wanders into the room where the Engie is in cryo-sleep? That Engie was placed there to be woken up. Woken up, to meet the people that had come that far from Earth, destroy them, hop in his ship and wipe out Humans. That's one of my theories, I feel a bit stupid about this because I have missed out so much stuff that will contradict what I've said, but that's the fun in it :) this film is confusing, it's great fun to think out how it works... have fun ripping my theory to pieces! :)