Your 2012 Christmas week movie schedule just got a little more crowded. Paramount has set Dec. 21, 2012 as the release date for Marc Forster's adaptation of the zombie infestation novel World War Z. That means star and producer Brad Pitt will be battling Lone Ranger, The Hobbit: An Unexpected Journey, Life of Pi and Quentin Tarantino's Django Unchained at the December box office. Good luck to all. [Deadline]