The Simpsons Movie
"The Simpsons Movie" by Yojimbo
When the creators of South Park made a movie version, they used the medium to push at the boundaries of censorship and produced something they would never have got away with on TV. Matt Groening produced an 80 minute episode of the TV show. Making the EPA the bad guys would've been a great idea if they had used it satirically, but they didn't. Instead they just wasted the opportunity to give everyone's favourite dessicated despot Mr. Burns more screen time. Amusing but unnecessary.