But Kinberg seems to suggest that Dark Phoenix’s reshoots were more cosmetic in nature.
So, according to Simon Kinberg’s take on the situation in his remarks to EW, it sounds like we shouldn’t necessarily worry about the reshoots that are occurring for X-Men: Dark Phoenix.
Reshoots have become relatively common in the blockbuster scene (they happen on everything from Rogue One: A Star Wars Story to Justice League), and they’re generally built into the production schedule as a way to fine-tune a film’s overall story and look.
Some reshoots do entirely overhaul movies and take them in different directions, which was the case with World War Z and reportedly might be the case with The New Mutants.