Not so sure why a lot are so worried about movies or stories being retconned. I still think that whatever YOU personally take as canon is how it works for this universe. Even with Disney saying most of the Star Wars novels n such are no longer canon, I really don't care, it all still is to me because I've been taking it that way all these years. I'm not changing my mind now just because there's a new owner of the franchise. So even IF the later Alien movies get retconned at some point, it ain't going to matter a lick to me, they will ALWAYS be part of the canon to me. If anything, I take the newer movies as just "What If's" Do I want to take Prometheus as canon? No not really, but I take bits & pieces from it to make my own. I absolutely hate that the Engineers are just humanoid looking beings & what I originally thought was their real head turns out to just be a helmet they wear but it's whatever to me at the same time. If I want, I can still take the comic versions as canon too I suppose. Anyway, that being said, I'm still looking forward to checking this out, whether it retcons things or not.