Avatar x Adventure Time: Broken Balance.
Spirit, Water, Earth, Fire, Air. My grandmother used to tell me stories about our history... about a time of peace. A time when the Avatar kept peace between the Spirit Folk, the Fire Nation, the Water Tribes, the Gumlic Empire, and the Air Nomads. Since the beginning of time, the Land of Ooo lived in safety and harmony under the protection of the Avatar. Then, everything changed when the Fire Nation attacked. Only the Avatar, master of all elements, could stop the Fire Nation. But when the world needed him most... he vanished. A century has passed, and the Fire Nation is nearing victory in the War. four years ago, my father and the men of my tribe journeyed to the war to help fight against the Fire Nation. They left me and my brother alone... to look after our village. Some people believe that the Avatar was never reborn into the Air Nomads. And that the Avatar cycle... has ended. But I haven't lost hope. I still believe that... someday... the Avatar will return to save the world.