You Cannot Call it Alien 5

Sigourney Weaver made a weird cameo in the film Finding Dory and she confirms that one of her next projects will essentially ignore the third and fourth sequels to Alien:

The 30th anniversary celebrations of James Cameron’s Aliens are getting underway, and as part of that, Sigourney Weaver has been speaking with Entertainment Weekly about the film. And, somewhat inevitably, the conversation shifted to Neill Blomkamp’s delayed Alien 5 movie, which is set to be a direct follow-on from Aliens. 

Blomkamp’s project has had to get in line as Ridley Scott makes Alien: Covenant and perhaps further Alien prequels (at least two more are planned, but it’s unclear if they have to be made before Alien 5 can get going), and per the original plan, it would have been shooting by now. Instead, it's in a little bit of limbo right now.

Blomkamp’s film is still an active project, though, and Weaver has revealed a few more details about the film. “It’s just as if, you know, the path forks and one direction goes off to three and four and another direction goes off to Neill’s movie,” she said, seemingly confirming that the idea is to overlook the third and fourth Alien films.

If you're going to ignore the 3rd and 4th movies, why the hell are you calling it Alien 5? I am hoping that's the working title. Shouldn't you just called it Aliens 2.5 or Alien Three: Huge Mistakes Have Been Rectified in This Series? Or am I being simplistic?

I do recall the Alien3 movie as being unnecessarily dark and dreary. It was innovative in that it used a camera angle seen from the aliens point-of-view as it scurried through corridors, but, beyond that, it was a huge, unimaginative let down. I have no working memory of a fourth Alien movie, as I'm sure many people do as well. It sort of reminds me of the Julianne Moore version of Jurassic Park that no one saw.