Well, I don't know about totally. The best version of Alien 3 doesn't really exist. It's somewhere between the Theatrical and Assembly cuts, and if Fincher had been, ya know, allowed to make his movie, he probably would have found that.
I think the most problematic thing for Alien 3 is that teaser. That beautifully nightmarish recollection of the original Alien Teaser.
I mean, Goht-Dammmn. Who doesn't want to see that
movie? The series was building to this for two films now. It can't get to Earth. It can't get to Earth. They get to Earth. Or damn-near close enough.
Of course none of the scripts i've ever read actually get to Earth. Renny Harlan wanted to do that movie, but they wouldn't go that route for whatever reason.
At this point i'd really like to see the series make a sharp-right turn. Away from Prometheus stuff, away from the original trilogy, and restart without a reboot. Just veer off into a different area of space, with a different time frame, sometime after Alien 3 maybe, and have a new story. You could do a lot with this franchise, and I think the saddest thing about the Prometheus stories is that, although it started out with loftier intentions, it tripped over it's shoelaces and tried to double back with Covenant.
So I say do something weird and psychological. Imagine doing something like a death cult that worships the avatar of the Alien, and there's a private investigator type who's looking into these ritualistic sacrifices, murders, maybe some kind of a mark they leave at the scene, and they're following it back to the source, and discover something along the lines of a very old lab on a nearby moon that has been abandoned, where this cult has basically taken up residence and is worshiping these representations of the Alien. Until they finally succeed in their "rituals" and an actual alien is born.
I don't know, you could do all kinds of things with the Alien franchise.