Despite the $500 million success that was 2007's The Simpsons Movie, the people behind the show aren't very enthusiastic about the idea of a sequel. While answering questions at UCLA's annual entertainment symposium, creator Matt Groening said, "It took us four years [to make the movie] and it killed us." He added that it "stole animators" and other resources from the series. Also on hand was longtime Simpsons producer and director David Silverman, who said they might be able to do another film in "maybe another 10, 15 years." We assume that the show's animators will have more time on their hands by then.