'World War Z' trailer pits Brad Pitt against mountains of zombies

By Cody Delistraty, NBC News contributor

After going way over budget and undergoing script rewrites and re-shoots, "World War Z" is finally coming to the screen -- and it looks to have all the trappings of a thrilling zombie blockbuster.

Just as director Marc Forster (of "Quantum of Solace" fame) has been working against the clock, budget problems, and unhappy producers to finish the film, so, too, Gerry Lane (Brad Pitt) must beat the odds. With only 90 days to stop a zombie apocalypse, Lane, a United Nations worker, must leave his family to hunt for clues around the globe, interview survivors, and find out how to stop the zombies.

Paramount Pictures

"I think these things have a weakness," Pitt's character says.

According to the latest trailer, which dropped Monday, something in Russia may hold the key. As Lane says "weakness," the trailer shows a boy crouching as zombies run past him, paying him no attention even while destroying everything else in their path. So what exactly is the secret then? Its tough to tell, but Lane must leave his family to find it.

Naturally, there are some stunning visual effects, such as when a plane is blown open in flight, la the