"God willing, we'll all meet again in
Spaceballs 2: The Search for More Money."
Comedies in general (and parodies in particular) often target popular genres and the conventions thereof. Of course, one of the many reasons these genres are so ripe for parody in the first place is because the conventions of them have been repeated to the point of ridiculousness by sequel after sequel after rip off after remake.
As a result, it's not uncommon for parodies of these genres to make a joke about having a sequel. Oddly enough, the movies that make these jokes rarely if ever end up actually having sequels made to them. This is probably because the jokes are inserted for the purpose of making fun of sequels, and actually creating one after that would be missing the point.
Compare Ridiculous Future Sequelization
Anime & Manga
- The 100% completion ending of Banjo-Kazooie shows snapshots of the eponymous characters obtaining items inaccessible in the main game. When asked what they're for, Mumbo Jumbo tells them they'll have to wait for the sequel (which was made a few years later).
- In the Game Boy Advance port of Donkey Kong Country, after the Kongs jump overboard and King K. Rool sails off, Cranky Kong the Meta Guy remarks, "Call that an ending? Looks like a cheap stunt setting up the story for the sequel!" In the Hero Mode ending, he tells Diddy, "You have really surpassed yourself! Who knows? Maybe you'll make the sequel."
- In Duke Nukem Forever, Duke meets on a dying character and merrily quips that he won't be in the sequel. He showed up again in the DLC.
- EarthBound joked about a sequel, and then it took it 11 years to actually get made. And it was Japan-Only.
- In Eternal Darkness one of the insanity effects was an advert for a sequel appearing, implying that the game was over.
- The Monkey Island games made a Running Gag out of referring to the franchise as having five games, even when there were only three or four. This became a Noodle Incident in Tales, which apparently skipped it over.
- The very last line in No More Heroes is Sylvia lampshading the bizarre ending of the game with "Too bad there won't be a sequel!" This, of course, turned out to be a lie.
- In Rayman 3: Hoodlum Havoc, Murfy leaves saying that he'll see us in Rayman 4. As of this writing, there has not been a game titled Rayman 4, or, indeed, any true sequel to Rayman 3.
- At one point in The Stinger to Kid Icarus: Uprising the final boss suggests that he may return, if they make a sequel 25 years from now.
- The Developer Room ending of Chrono Trigger has one of the members of the development team ask "Do you want a Chrono Trigger sequel? YES/NO".