A second trailer for the upcoming sc-fi comedy Monsters Vs Aliens can be found in HD as well as standard definition on MSN. The new DreamWorks film, which opens in theaters on March 27 of next year, features the voice talents of Reese Witherspoon, Seth Rogen, Hugh Laurie, Will Arnett, Kiefer Sutherland, and Stephen Colbert. Monsters Vs Aliens follows group of government employed creatures in their efforts to defeat an extra-terrestrial invasion.