Back in season 2 episode 21, "Paradigms of Human Memory," a clip show made up of new clips, Abed kept telling Jeff he believed in the success of NBC series The Cape. And that it would get "six seasons and a movie." Jeff didn't believe him.
And ever since then, "six seasons and a movie" became the rallying cry of Human Beings (Greendale's mascot) everywhere. Not only because Community slowly lurched its way to that sixth season on Yahoo!Screen, but because the film was still on everyone's wish list.