The Simpsons movie was a highly regarded film when it was released back in 2007. Hitting the right chords with fans and critics alike. Though if you're hoping for a sequel anytime soon, since it did make $500 Million at the box office, you're going to be waiting awhile. The Hollywood Reporter were at the UCLA Entertainment Symposium on March 8, where Simpsons creator Matt Groening and producer-director David Silverman were keynote speakers at a Q&A. From what both men have to say, a sequel to The Simpsons movie seems to be on the back burner.
Matt Groening is on note saying at the Symposium, "It took us four years to make and it killed us," He continued on saying, "the movie stole animators from the show and drained other resources." Now from that you can say that Groening has squashed any hopes of a film happening anytime soon, but David Silverman leaves fans with some hope saying, "Maybe another 10-15 years," which at least means they're thinking about it.
From what both Groening and Silverman say, they give off the impression that fans shouldn't hold their breath for a sequel. The movie took too much of a toll on them and their staff, which means the TV series itself is the main priority right now. Which for longtime Simpsons fans means that even without a sequel on the horizon, as The Simpsons near 25 years on Fox TV, will live on television for a long time to come.