I really wish that that two Alien series rumor had had some weight to it. Would have been nice to have had concurrent projects, one from Ridley finishing off his arc (I'd be down to see it concluded in film or as a series) and one going off in a different direction to tell an entirely separate story.
But since that doesn't seem to be the case, I absolutely want to see Ridley's arc completed before we move off into whatever new direction they eventually plan on going in. And I'm all for new directions; the major appeal of the Alien franchise, for me at least, is seeing it reinterpreted with unique visions by different filmmakers. So let's finish up the current ongoing vision that is Ridley's prequel story, and then hand it off to the next set of filmmakers for their take on things.