In the Cannon factory, Just before Shen fires at Po, the Cannon does not work As intended, and Blasts Po, the Furious Five and Shen into another universe entirely, The universe of the four elements.

The search for the new Avatar began - and it ended - with a Tortoise.

Book One: Earth and Air. The Valley's only big, fat panda has suddenly been chosen as the Avatar, the elusive, formerly missing bringer of peace and balance. He must master kung fu AND the four elements if he is to save his home from the forces that threaten it.

Lord Shan is defeated, and Po is at peace. But something else seems to be stirring up in China. An enemy seeking power. As Po uncovers the villain behind it, he also uncovers a new friend that was an old enemy. (Crossover with Avatar the Last Airbender, but just the idea with bending.)

Wolves were now famous across China for slaying most of the Pandas, now when one shows up in the Valley of Peace to look for the Dragon Warrior and offer the unknown art of the Leading family of Wolves to the Five and Po they learn they must prepare for the Wolves who plan on destroying their brother for betraying their family. Now War shall consume the valley, or will it survive?

A week after Avatar Aang defeated Fire Lord Ozai and ended the war, he and the new Fire Lord Zuko have been summoned by Oogway at the Jade Palace in China to help aid the Dragon Warrior in his quest to defeat Tai Lung and bring peace to the Valley of Peace. (Aang and Zuko will also be turned into animals to fit in with Kung Fu Panda. (Writers block)