While nothing is concrete, if Fox decides to go through with this afterwards they finish the Prometheus movies-- I'll have to ask why wait for over twenty years just to retcon something that was ill-received but later on "forgiven" by fans so many years later on? Why didn't they do it back in the mid to late 90's when Resurrection was in the works?
As for them writing out Alien 3... Well, I am not too keen on that. I mean explaining that it was a dream is understandable but for me that is a very hard pill to swallow. Why can't alternate universes be used to explain where and how this movie takes place? Why all this retconned crap?