There were rumors of rewrites and reshoots, though the more that the origin-story feature film got pushed back on Fox’s release slate, the more that it meant it probably would be a victim of Fox getting acquitted by Disney, and Disney not wanting to release a version of a movie universe that they now want to start over on.
The New Mutants has been directed by Josh Boone, but it has been in a perpetual state of limbo for some time.
But then it got pushed back to February of this year, and finally to August.