In an interesting casting rumor, it appears as though Tom Cruise may be providing the voice of the villain in Shrek Goes Fourth. According to Cinema Blend, DreamWorks is considering using Cruise in the latest installment of the widely successful franchise which is set to hit theatres in 2010. Cruise recently stole the show in Tropic Thunder thanks to a scene-chewing supporting role as a movie studio exec. The actor can be seen this December in the World War II thriller, Valkyrie.