Since the announcement there would be a New Mutants film, there has been discussion on which characters would make it into the film. The wait is over as the team lineup has been announced.
The Hollywood Reporter had the scoop:
The movie will focus on the angst-driven adventures of a diverse group of teens that include Native American Danielle Moonstar, Scots girl Wolfsbane, Brazilian ladies man Sunspot, a Kentuckian code-named Cannonball, and Russian teen Magik. Also in the mix will be an alien named Warlock.
Dani Moonstar, Wolfsbane, Sunspot, and Cannonball, all of whose first appear is Marvel Graphic Novel #4
Magik first appeared in Giant Size X-Men #1 as Illyana Rasputin, however she first appears as Magik in New Mutants #14
Warlock first appears in New Mutants #18