Brad Pitt preps to fight zombies in 'World War Z' trailer Hey, you know what we don't see enough of in modern entertainment? Zombies. Someone should really resurrect (sorry) that trend. Ha, kidding -- the undead have eaten up more than their share of media dollars thanks to TV's "Walking Dead" and movies like "28 Days Later." But as we all know, they cannot be stopped. The zombie apocalypse movie "World War Z" was originally planned to hit theaters this December, but has now been delayed till next June. It's based on the much-praised book by Max Brooks, son of moviemaker Mel Brooks and actress Anne Bancroft. But as CinemaBlend points out, and the new trailer backs up, book fans may be disappointed in the film. Ha, that never happens, right? Paramount Pictures Brad Pitt stars in "World War Z." "World War Z" the book is a fascinating history of a zombie war, with chapters ricocheting from the viewpoint of different people in different countries, incomes, and levels of involvement in the conflict. But the trailer focuses on Brad Pitt trying to protect his wife (Mireille Enos) and their two kids as the zombie apocalpyse apparently makes itself known through a really bad traffic jam. Lots of kids in peril scenes that will freak out sensitive parents, lots of long-haired Pitt in protective dad mode, not a lot of visible zombies. Now maybe that's just how the trailer was cut. Pitt plays a UN employee who travels the world to interview survivors, which gets at more of the book's style. Still, it's easy to envision a trailer cutting between Pitt interviewing and various people the world over telling snippets of their zombie story. We've seen the dad-protecting-kids thing many times before. Tom Cruise in "War of the Worlds," anyone? Watch the trailer and judge for yourself. "World War Z" hits theaters June 21.