Fox is indeed inept as Deadline reported.
https://deadline.com/2019/06/dark-ph...hy-1202629749/Now, Dark Phoenix was originally planned to be two movies, we hear, and during late pre-production, the studio changed gears and said it was to be one movie. Kinberg, we hear, was flexible and rewrote. Days of Future Past erased the timeline of The Last Stand, so a rebooted story about Jean Grey was possible here. Our sources tell us that testing Dark Phoenix was a continual headache, and the feature adaptation of Chris Claremont, John Byrne, and David Cockrum’s fan-beloved Dark Phoenix Saga comic was hard to get right.
Back in 2017 Olivia Munn said in a Collider interview that the movie was a two parter.
http://collider.com/olivia-munn-inte...enix/#oceans-8MUNN: I don’t know what I’m supposed to say. I’m supposed to be vague. That’s my answer. I’m horrible at that. It’s like a two parter, this movie. That’s more than I’ve said, in general. I don’t know why people have to be so secretive.
Remember the rumors about Jessica Chastain playing Lilandra?