Oddzwiggles

I would say have all of the important turning points in the movie. Like if there was a movie for Kingdom Hearts 2, it'd have only the parts with the Organization in it. Like The Land Of Dragons, it'd only be the second visit. They spot Riku going up the mountain followed by Mulan and Mushu running into them, causing them to regognise Mushu and continue on from there to meet Xigbar and cutting out the dragon. Or for Kingdom Hearts 1, leave out a few worlds like Olympus Colliseum and hint on it later and cut down a lot of time from the other worlds like Atlantica and Wonderland. It'd be kinda difficult but interesting to see.