Among the numerous X-Men films, sequels and spinoffs that are currently in some stage of active development is New Mutants. That particular X-installment is a film adaptation of the X-Men comic book series about a team of teenaged mutants that was created by iconic X-Men comics writer Chris Claremont back in the early 1980s (and gained fresh life when its second series launched in the 2000s). The New Mutants movie adaptation is being co-written and directed by Josh Boone, a filmmaker who made his name with a very different sort of young adult adaptation: 2014's The Fault in Our Stars, based on the John Green novel of the same name.
X-Men franchise screenwriter/producer Simon Kinberg recently said that filming on New Mutants is tentatively slated to begin in the early goings (read: first half) of 2017 - and back in April of this year, Boone revealed that he and co-writer Knate Lee had likewise already turned in their second draft of the New Mutants script. It now appears that the New Mutants script has since been re-written (or is being re-written) by two of Boone's trusted collaborators.
THR is reporting that New Mutants is now being written by Scott Neustadter and Michael H. Weber: the same pair that wrote Boone's Fault in Our Stars adaptation, as well as fellow YA literary adaptations The Spectacular Now and Paper Towns (the latter of which is also based on a John Green novel). The duo are presumably revising the earlier New Mutants script draft by Boone and Lee (with Boone's oversight), so that the end result is that all four screenwriters share writing credit on the film (either for screen story and/or screenplay).
THR is also reporting that the New Mutant movie character roster includes: Danielle Moonstar a.k.a. Mirage, a Native American woman whose mutant abilities allow her to conjure images of other people's fears; Rahne Sinclair a.k.a. Wolfsbane, a Scottish woman with werewolf-like transformative abilities; Roberto da Costa a.k.a. Sunspot, a Brazilian man who can manipulate the power of the sun and sunlight; Sam Guthrie a.k.a. Cannonball, a man from Kentucky who possesses flying abilities; Illya Rasputin a.k.a. Magik, a Russian woman with sorceress-like mutant powers; and Warlock, a member of an alien race known as the Technarachy.
Save for Warlock (who, along with the other characters listed, has been teased for New Mutants by Boone), all of the aforementioned characters have been reported as being part of the New Mutants character roster since last March. That same report claimed that the front-runners to play Wolfsbane and Magik were - and may still be - Maisie Williams (Game of Thrones) and Ana Taylor-Joy (The Witch), respectively. Those roles haven't been officially filled as of yet, but that should change soon, maybe before the end of the year. However, Kinberg has confirmed that Professor X (James McAvoy) is in New Mutants, as it now stands.
The addition of Neustadter and Weber as writers on New Mutants is, if nothing else, further confirmation that this X-Men installment will have a proper YA vibe to it; as opposed to the operatic tone of the mainline X-Men films, as well as the irreverent approach of the Deadpool series and the harder-edged Wolverine films (including the upcoming, R-Rated, Wolverine 3). That's encouraging too, seeing as the people involved with New Mutants all have a good track record for YA entertainment - and should help to further ensure that each upcoming X-Men film stands apart with its own unique flavor and style, so to speak.
Wolverine 3 opens in U.S. theaters on March 3rd, 2017, followed by unannounced X-Men films on October 6th, 2017, March 2nd, 2018, and June 29th, 2018. Deadpool 2, Gambit, New Mutants and X-Force are currently in development.