Fans are used to seeing the "X-Men" characters in a certain way on film, but "The New Mutants" director Josh Boone is "trying to do something very, very different" with his upcoming spinoff.

Maisie Williams (playing Wolfsbane) and Anya Taylor-Joy (Magik) have already been cast in "New Mutants," and sources close to production told Entertainment Weekly that Henry Zaga of "13 Reasons Why" will soon be announced to play Sunspot. (Rosario Dawson may be joining the cast as well.) The comic book follows a group of teen mutants who must learn to control their powers. We've seen versions of that before, but here's Boone sharing his ambitious plan to EW:

"We are making a full-fledged horror movie set within the X-Men universe. There are no costumes. There are no supervillains. We're trying to do something very, very different."

A source close to the project shared more plot details with EW, including this logline: "Held in a secret facility against their will, five new mutants have to battle the dangers of their powers, as well as the sins of their past. They aren't out to save the world — they're just trying to save themselves." Mutants are said to be most dangerous when their powers are new, like when they're teenagers.

"The New Mutants" is reportedly scheduled to begin production in July for a projected spring 2018 release date, aiming for a PG-13 rating -- which is good to attract teens, but bad for anyone hoping for another "Logan."

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