This is a great story. Can you take a look at my idea. You should put a new character, who is a apprentice of Chase Young or Hannibal Bean, and he is the Dragon of Darkness. His personality should be mix of Riku Kingdom Hearts and Cloud from Final Fantasy 7. At the beginning he should be cold to the xiaolin side and always fought with Aly. Until later he starts seeing his ways are wrong and starts being warm with the xiaolin side. Then he will eventuall betray chase young or Hannibal and join the xiaolin side.