Predicting How 2019's Biggest Movies Will End

2. Antonio Banderas' "Surprise" Cameo - The New Mutants

It was revealed in late March that The New Mutants would be delayed from its planned February 2019 release date to August of that year, while set sources claimed that Fox had ditched an originally planned post-credits scene featuring a cameo from Mr. Sinister, who would have been played by Jon Hamm.

Furthermore, reports added that Sinister has been substituted out for a new villain, who will be played by none other than Antonio Banderas and make his debut in the film's new post-credits tag.

Obviously plans could change in the next 9-ish months before The New Mutants is finally released - especially with the cat being out of the bag almost 18 months before the movie hits screens - but you should most definitely expect to see him show up as...somebody before the film is over.