He will mostly likely appear in the second film, The Hobbit: There And Back Again, as he is the Dwarf cousin of Thorin Oakenshield (Richard Armitage) and follows the path to war during the Battle of the Five Armies apparently. It has been so long since we’ve read the novel, we’ll just take Wikipedia’s word on that.
The Hobbit: An Unexpected Journey follows title character Bilbo Baggins, who is swept into an epic quest to reclaim the lost Dwarf Kingdom of Erebor, which was long ago conquered by the dragon Smaug. Approached out of the blue by the wizard Gandalf the Grey, Bilbo finds himself joining a company of thirteen dwarves led by the legendary warrior, Thorin Oakensheild. Their journey will take them into the Wild; through treacherous lands swarming with Goblins and Orcs, deadly Wargs and Giant Spiders, Shapeshifters and Sorcerers. Although their goal lies to the East and the wastelands of the Lonely Mountain first they must escape the goblin tunnels, where Bilbo meets the creature that will change his life forever … Gollum.
The Hobbit: An Unexpected Journey is released on 26 December 2012 in Australia from Roadshow. The film will debut in the US on 14 December 2012.