It turns out that rebooted for the Marvel Cinematic Universe in a few years, now that Disney has finalized its purchase of Fox's assets. This will be the second time the X-Men have been rebooted on the big screen, after 2011's X-Men: First Class introduced (much) younger iterations of the characters from the 2000s X-Men trilogy.
Initially, it appeared that Fox and Dark Phoenix writer-director Simon Kinberg were planning to use the movie to kick-off another trilogy, this time focusing on the X-Men trainees introduced in 2016's X-Men: Apocalypse (played down the impact of the Disney-Fox deal on the series' ending.
Nevertheless,the Dark Phoenix trailers).
It's worth mentioning that Kinberg has alluded to this in the past, having previously said that The Predator, in which Shane Black re-filmed the third act entirely. The Predator's theatrical cut was widely criticized for being a messy patchwork of reshoot footage and material leftover from earlier versions, so hopefully that won't end up being the case with Dark Phoenix too.
Whichever way things shake out, Dark Phoenix is clearly aiming to provide a sense of closure to the First Class storyline and its characters, including the younger mutants introduced in Apocalypse. The film well, except for Deadpool), but it would still be nice if Dark Phoenix ended Fox's run with a bang, rather than a fizzle.
Source: EW