I also noticed that this doesn't specifically mean they are retconning anything.
On the one hand, I think that by 'Genetic-sibling' this could just mean an ALIENS-vibe and I agree this is what the final film needs, and what he is well suited for as a director, but on the other hand, retconning is lazy and I'd almost rather they didn't bring Sigourney back if they are going to retcon the mess that A:R was as an ending, and escalate that into making a giant disaster of franchise, instead.
They just got something right by ignoring AVP, and that was deserved because it took a dump on all 4 Alien films...
I will still see the movie but retconning anything is just massively, massively lazy and tells me someone can't write. It doesn't require much thought to simply push where A:R left off, into an ALIENS-like vibe. Especially with how much time has passed.
I just need to hear a good reason for the retcon. Just to bring Hicks back? That's really a lazy terrible unecessary reason to nix two entire sequels.