According to The Hollywood Reporter, the veteran of Marvel's Netflix dramas is targeting the role of Dr. Cecilia Reyes, a physician and, in Marvel Comics lore, a one-time member of the X-Men who can project a protective bio-force field around herself. She'll serve as a mentor to the young mutants in the film. Dawson will join Game of Thrones star Maisie Williams as Wolfsbane and Atlantis actress Anya Taylor-Joy as Magik. 13 Reasons Why actor Henry Zaga is expected to be announced as Sunspot soon.
Introduced by Scott Lobdell and Carlos Pacheco in 1997's X-Men #96, Cecilia Reyes has appeared frequently over the past two decades as a supporting character, sometimes as the team's resident physician.
As nurse Claire Temple, Dawson has served as a link between Marvel's Netflix series, with appearances on Daredevil, Jessica Jones, Luke Cage, Iron Fist and the upcoming The Defenders.
The New Mutants is described by director Josh Boone (The Fault In Our Stars) as "a full-fledged horror movie set within the X-Men universe," one without costumes or supervillains. Although it's thought to be primarily inspired by "The Demon Bear Saga," the influential 1984 Marvel Comics storyline by Chris Claremont and Bill Sienkiewicz, the film nevertheless appears to deviate significantly from the source material, based on this description: “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.”
Arriving in theaters on April 13, 2018, The New Mutants is expected to begin production in July.