None of the film or TV series we're about to mention are bad -- we're not saying that. Some of them are great, even. But each of them was presented as having a master plan from the start, an overarching story or mystery that caused viewers to wait intently for the resolution, to see what the creators had in mind.
But time and time again, it turns out that the creators had nothing in mind at all, figuring they could throw out the mystery now and figure out the rest when it got closer to deadline. This is true of the minds behind...
(Cracked's Adventures in Jedi School mini-series wasn't made up on the fly. But we'll pretend it was if that will impress you.)
The Original Star Wars Trilogy
The first film says it's "Episode IV" right in the opening credits. That's what makes Star Wars different from, say, Transformers or even the Matrix trilogy -- it was a single grand epic spawned in the possibly deranged mind of George Lucas long before cameras started rolling on the first film.
"There's no way the first three are anything but gold!"
According to the legend, when Lucas began writing the story it got too big for one movie, so he decided to split it up. Shortly after releasing the first film, Lucas claimed he already had an idea of what all nine parts of the saga would be about.
"Bullshit. They'll all be about stupid, pointless, petty bullshit."
But Actually ...
Obviously there have been only six films (Lucas now says there were always supposed to be just six). But the truth is, when he released the first film he had no idea it was anything other than a stand-alone movie. The studio greenlit only the one film, and they had their doubts about making their money back. Lucas thus had to write it assuming he'd never get a chance to add to the story.
Most fans don't realize that the famous "Episode IV" isn't anywhere in the original opening crawl -- it was only added to later prints.
The original Star Wars started production under the name Adventures of Luke Starkiller, as taken from the Journal of the Whills, Saga I: The Star Wars, later shortened to just the last two words. The idea of numbering the episodes came up with the second film ... which was originally announced as Star Wars II.
"Star Wars II: Electric Boogaloo, thank you very much."