Marvel Studios is in talks with Mark Ruffalo to appear as the Hulk in Thor: Ragnarok, according to Deadline. Coincidentally, Ruffalo and Thor actor Chris Hemsworth are the only two Avengers not scheduled to appear in 2016's Captain America: Civil War.
Filming is expected to begin early next summer, based on a screenplay by Christopher Yost and Craig Kyle. Marvel Studios President Kevin Feige has said that Tom Hiddleston will reprise his role as Loki, and Jamie Alexander has said she will return as Sif in this new installment.
Thor: Ragnarok is scheduled for release November 3, 2017.