Bryan Cranston, best known for his role in AMC's 'Breaking Bad', is in negotiations for a small role in Brad Pitt's upcoming sci-fi epic, 'World War Z'. Based off the Max Brook's novel of the same name, the film will document the world a decade after the global zombie apocalypse. Written in part by well-known comic scribe J. Michael Stracynski, 'World War Z' is set to hit theatres in Summer 2012.