Land Before Time and
Kung Fu PandaWhen the Furious Five (and Po) learn of a plot that involves mystical warriors going back in time to destroy the place where the Jade Palace and the Valley of Peace would be; (which obviously would be the Great Valley) Po, Tigress, and Crane subject themselves into a trance that allows them to go back in time and stop them.
They become dinosaurs (about the size of the GoF) in the process.
Po becomes a threehorn
Tigress becomes a longneck
Crane becomes... well... a flyer
Meanwhile, an acient prophecy is born. In the event that any force attempts to disrupt the Valley of Peace from being formed; five residents of pure heart would be given knowledge of Kung Fu, and they would defend the Valley from harm.
Just guess at who I'm talking about here...
Anyway... Po, Tigress, and Crane must now team up with Littlefoot, Cera, Ducky, Petrie, and Spike in order to defeat this new enemy.
I know, it's the craziest one I've done yet...