I would say the divisive nature is inevitable, and that is ok. We're fans and we're passionate. It's normal. I'm not an admin here, but I would think that pro or con statements about this issue would make as much sense here as anywhere else, so why not?
I think that the idea of having another film with Ripley is great. As an actress, she was at the core of the series and she deserves another shot. The statements that many fans make that she is not needed for the series are fair, but another film with Sigourney Weaver while we still have her will be appreciated for generations to come. If the opportunity is missed now, it will soon be too late. We're all getting older. Sure Ripley 8 would be interesting, but I think the masses found that relationship between Ripley and Newt and Hicks to be the most compelling. It's the film that many of us are dying to see, whereas nobody is really dying to see a Ripley 8 film. IMHO anyways..