A UFO has landed in America. Soon enough, the alien living inside the spaceship makes contact with the government to unveil his purpose; that is, to take over the Earth. Answering to the alien's threat, the government takes action. When the bombing of the spaceship doesn't work, the government goes with its last option, unleashing the monsters.
In the newly-released trailer of "Monsters vs. Aliens", the ragtag group of monsters consisting of Dr. Cockroach, The Missing Link, B.O.B., Insectosaurus and Ginormica are introduced. Most of the trailer's footage display the comical side of the monsters and their efforts to stop the alien from destructing the Earth. Beside this trailer, a new featurette showing the first look with director Rob Letterman has also been outed.
Featuring the voices of Reese Witherspoon, Paul Rudd, Rainn Wilson, Hugh Laurie, Seth Rogen and many else, the DreamWorks Animation film will be available in the U.S. theaters on March 27, 2009.