I have a problem with introducing the xenomorphs in the prequel movies too much. A newcomer who watches the prequels first will miss all the mysteries in alien. Because everything is already explained.
I like the idea that the space jockey is some kind of an alien creature and from this creature, the engineers got all the technology.
I think it would be cool to see David fails with his creature and they mutate to something different. Or somehow they bring back the deacon. I want to see something like that, but the protomorphs will destroy the original alien movie very much. They should not take too much forward.
I would love to see a 3rd alien prequel. But I'm very afraid where this goes with Ridley Scott.
And yes they did money with covenant. But it was a huge drop compared to Prometheus. I think the chance that a 3rd movie is going to have another big drop is very high. I think the studio is not willing to risk that.