The New Mutants movie was made before 2020 .
In the same interview , he confirmed the studio plans on Mister Sinister appearing in upcoming X-Men films. * Jon Hamm was cast to portray the character , in The New Mutants ( 2020 ) , though the role has reportedly been cut from the film due to an extensive reshoot schedule.  : //www.tracking-board.com/inside-the-drama-surrounding-foxs-new-mutants-including-a-top-secret-new-cast-member-exclusive/
Mister Sinister