"The Revenant", starring Leonardo DiCaprio, will be released on Christmas Day but you can watch the trailer online now. The movie is based on Michael Punke's book "The Revenant: A Novel of Revenge". DiCaprio plays the protagonist, Hugh Glass, a fur trapper in the 1800s. He gets mauled by a grizzly bear, then robbed and left for dead. Not surprisingly, he gets angry and plans to exact revenge. The film is directed by Alejandro Gonzales Inarritu.