Columbia Pictures has released the first full length trailer to its summer comedy, Year One. Directed by Harold Ramis, this film is set in the prehistoric age. It stars Jack Black and Michael Cera (Juno). Overall the film looks amusing enough but could it wind up being this generation’s Life of Brian or even History of the World? Cera’s one amusing guy but is he a one trick pony? These answers and more when Year One hits theaters June 19. Paul Rudd, Hank Azaria, Olivia Platt and Olivia Wilde costar.