... And then their kids get married and have kids, then a new emperor gets instated, then Bob and Alice have marital problems having met on an adventure, then they resolve those problems, then Bobby Jr. joins the soccer team, then...
An entire sequel is made to wrap up the loose ends.
Downplayed: Bob and Alice defeat Emperor Evulz, but their return journey takes roughly as long as the third act itself.
Zig Zagged: It seems like there will be a long ending sequence, but then the credits begin to roll. Then, just as the credits are a fifth of the way done, it immediately cuts back to the movie, but then the credits continue rolling under the movie, but then the scene ends and it's just the credits, but then a little window pops up showing what happened to the other characters while the credits roll. Then, after it's all over, there's a twenty-minute scene after the credits. Then that scene has its own credits.
All of the loose ends are wrapped up as Bob and Alice defeat Emperor Evulz. There is a brief resolution where Bob and Alice plan to return home and get married offscreen, and the story ends.
There are no loose ends, and the ending is short and sweet.
"We have to make sure the audience knows absolutely everything that happened to everyone after the plot is wrapped up!"
Discussed: "Well, that's that. We don't need a long, drawn-out ending."
Conversed: "I love adventure movies. I just don't like those endings where they have to show you what happened to every - single - character. Or worse, they bring up a bunch of random subplots that just don't go anywhere."
Reconstructed: It turns out this new problem has enough drama to create its own story.
Played For Laughs: Whenever Alice and Bob think that this must be the last loose end, someone points out another one. This continues until everything really is resolved.
Played For Drama: It turns out the widespread effects of the story were actually much worse than Bob and Alice expected, and the long ending drives home the horrible things they've done to get this far.