As promised, here’s the latest trailer for the Marvel Studios release, Guardians of the Galaxy. For the first time, viewers will hear the voices of Rocket Raccoon (Bradley Cooper) and Groot (Vin Diesel). The movie opens August 1st, 2014 and also stars Chris Pratt, Zoe Saldana, Dave Bautista, Karen Gillan, John C. Reilly, Benicio Del Toro, Djimon Hounsou, Michael Rooker and Glenn Close. Enjoy!