Brad Pitt as United Nations employee Gerry Lane struggles to save his family in World War Z.

Brad Pitt may finally have bitten off more than he can chew with his latest movie “World War Z.” With the last trailer now out before it’s June wide release, the flim has been pegged as everything from a colossal flop to a surprise hit of the summer.

Pitt’s production company Plan B has bankrolled much of the picture’s cost, including re-shoots of the film’s ending.

The final tally for the film is now reported to be $400 million, up from its original budget of $170 million. Working against the film is the fact that it lacks a ready fan base, outside of cult zombie fans.

Although it’s base on a popular 2006 horror novel by Max Brooks, it doesn’t have the following of other major blockbusters like comic book heroes Iron Man and Spider Man. Plus some claim the film’s widely reported production problems will weigh against it at the box office.

The film’s final cut reportedly departs sharply from the book, which may disappoint zombie fans. The film will also be going up against the new Superman reboot “Man of Steel,” which is one of the most widely anticipated films of the summer blockbuster season.

On the other hand, early screenings of World War Z for select audiences have produced some positive reviews, but they nearly always do.

One thing is certain, Pitt, 49, is working hard to push the film. He made a surprise appearance at a screening in New Jersey.

The actor’s partner Angelina Jolie also made her first post-double mastectomy appearance at the film’s London premiere to help generate buzz.

In the latest trailer, Pitt as United Nations employee Gerry Lane, is torn between leaving his family and dedicating himself to the fight against the zombies. He co stars with Mireille Enos, James Badge Dale, Matthew Fox and David Morse.

Check out the trailer below, let us know your thoughts about the film and follow TheImproper on Twitter to keep abreast of all the latest developments with “World War Z.”