Miiko Fyrene
Witchfinder General
Prometheus was released as a prequel to Alien. A xenomorph appearing in it isn't a weird surprise, considering how there are many things in the film that link to Alien. Peter Weyland being in it should have been a big giveaway?
Oh, well the only Alien movies I've seen were AVP and the newest Predators movie.
I highly recommend watching the Alien quadrilogy, or just the first two
Also, if you like Predator, you should really watch the first one with Arnie, it's great