The Last Airbender of the Grand Line

Ozai manages to get his revenge, after escaping jail he gets a group of old colleagues to banish Aang and his friends so they can never defeat him again. The Avatar gang plus some surprise guests are all sent to a world where the ocean is enormous and the dream of being king of the pirates is the big one. Aang ends up in the middle of the ocean where he meets a boy named Luffy.