Entertainment Tonight has posted a brand new featurette for the upcoming Dreamworks Animation film Monsters vs. Aliens, which tells the story of a human race that turns to monsters to fend off an alien attack. With those sleek, almost Pixar-like but not quite graphics and a big voice cast, MvA should be one of the more anticipated animated films of 2009. Opening in conventional theaters and IMAX on March 27, the 3-D animated-comedy features the voices of Reese Witherspoon, Hugh Laurie, Will Arnett, Seth Rogen, Rainn Wilson, Stephen Colbert, Kiefer Sutherland and Paul Rudd.