Got around to seeing me an Alien movie, and my short answer is this: it fell short of what it should have done in exactly the same way that Prometheus did before it, but without the benefit of my belief that if only Prometheus were the first half of a longer story, everything would come to rights again.
Here’s the thing. Alien: Covenant is exactly the movie I was looking for, a sequel in which we find out What Happens Next. …at least, it should have been. It so easily could have been. Instead, that plotline is jettisoned in favor of something that is no longer sfnal at all and back to pure horror. Which, okay, that is where this series started, and there’s nothing wrong with it, and I kind of appreciate the specific details of this horror movie, none of which I will be telling you.
But then, after failing to deliver on the possibilities of the first movie, it simultaneously fails to deliver on a bridge to the original 1979 Alien, which is the only other job it had. In point of fact, timelines being what they are, I would say it is impossible to get from this story to that one. (And if I were to ignore timelines, which is at least semi-possible, it would mean that to get from here to there, I would need Ridley Scott to make exactly the movie I wanted him to make this time, which he is clearly unwilling to do.)
Long story short once again, my advice is stick with Alien/Aliens and assume Ripley got her happy ending, as that is the best way to deal with this series.