Plot details are being held under wraps, but the studio is planning on expanding her role as Jane Foster's (Natalie Portman) sidekick in the film.
Alan Taylor is directing from a script by Don Payne and Robert Rodat.
Production will begin this fall in London.
Thor: The Dark World was released November 8th, 2013 and stars Chris Hemsworth, Natalie Portman, Tom Hiddleston, Anthony Hopkins, Christopher Eccleston, Jaimie Alexander, Zachary Levi, Ray Stevenson. The film is directed by Alan Taylor.