Travis Knight will direct Mattel’s He-Man movie adaptation Idris Elba is in early talks to play Man-at-Arms in the upcoming live-action feature film “Masters of the Universe,” based on the iconic Mattel franchise, TheWrap has exclusively learned. Elba would star alongside Nicholas Galitzine in the role of He-Man , Camila Mendes, who is playing Teela , and Alison Brie as “Evil-Lyn.” Travis Knight is directing the film from a screenplay by Chris Butler (initial draft written by David Callaham,