At one point, the movie was going to be set in the 80s and feature Storm and Professor X, which confirms rumors about James McAvoy and Alexandra Shipp posted earlier in this thread. Turns out it was changed because the studio didn't want any more X-Men movies set in the 80s due to the failure of Apocalypse, even though the time setting was hardly the issue with Apocalypse.
Also, Josh Boone seems to confirm that the movie still takes place in the X-Men Cinematic Universe as he infers that there is a reference to Professor X.
https://www.slashfilm.com/new-mutants-setting/
Also, Josh Boone seems to confirm that the movie still takes place in the X-Men Cinematic Universe as he infers that there is a reference to Professor X.
https://www.slashfilm.com/new-mutants-setting/