Also, the ending changing had nothing to do with Captain Marvel.
https://deadline.com/2019/06/dark-ph...hy-1202629749/We heard that in one cut, Jean Grey dies, which wasn’t received well. But overall, the major ending change-up, executed in reshoots, entailed going from an intimate ending with Jean Grey (Sophie Turner), Tye Sheridan (Cyclops), and Charles Xavier (James McAvoy) against Jessica Chastain’s Vuk. The feeling from the audience in testing was that they wanted to see all the X-Men heroes fighting in the end. There have been reports out there that the ending was changed-up because it was too similar to Captain Marvel. This isn’t true: No one on the Fox/Dark Phoenix production side had any intel of what Captain Marvel would be like before it was released. It was the all-team reshoot that pushed Dark Phoenix from its original Nov. 2 release date (which went to ultimate 4-time Oscar winner and Fox blockbuster finale pre-merger Bohemian Rhapsody) to Feb. 14. We understand Kinberg got to make the film he wanted to make, and was flexible about reshoots with the studio. Many would like to feasibly blame a screenwriter-turned-first time $200M production film director on missing the mark here. However, as we wrote, Kinberg demonstrated his finesse in saving previous Fox/Marvel and X-Men productions. Fox production executives could have gone with a more seasoned director, but decided not to, and in doing so, they failed in riding herd on Kinberg early enough. By the time they did decided to ride monitor Kinberg, it was too late, and production was too far down the road.