Josh Boone, writer and director of New Mutants, announced in December that his movie would start filming this May.
Having said that, we did know that at least one film in the franchise was planning to film this year.
Although, considering the number of new characters that New Mutants will apparently introduce, it’s hard to believe that Turner would have much more than a cameo if she did appear.
It’s possible that this is the movie that Sophie Turner is referring to.