WARNING: The following article contains major spoilers for Dark Phoenix, in theaters now.

As Dark Phoenix concludes its lackluster opening weekend, new details about the originally planned ending have been to surface online.

Changed during extensive reshoots last year, filmmaker Simon Kinberg had previously revealed that original ending had featured considerably fewer characters than the final theatrical version and was a more intimate, personal climax than the finale in the film.

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According to Deadline, the original ending reportedly had Sophie Turner's Jean Grey killed during her final confrontation with the alien Vuk, portrayed by Jessica Chastain. While details about how exactly Jean was to die are still currently unknown, only Cyclops and Professor X would've helped the Phoenix Force-possessed hero against the extraterrestrial antagonist. However, test audiences did not react well to Jean's death or the lack of additional X-Men in the scene so the ending was changed.

The film's theatrical ending is much more epic in scope with the X-Men and Brotherhood of Mutants teaming up to fight Vuk and her D'Bari associates on a military train attacked by the alien race. Jean's fate is left considerably more ambiguous, flying into deep space following the team's defeat of Vuk. How much of what follows after the final battle was added by reshoots is also unknown but hints at what was originally planned for Fox's final X-Men film.

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Directed and written by Simon Kinberg, Dark Phoenix stars James McAvoy, Michael Fassbender, Jennifer Lawrence, Nicholas Hoult, Sophie Turner, Tye Sheridan, Alexandra Shipp, Kodi Smit-McPhee, Evan Peters and Jessica Chastain. The film is out in theaters now.