I welcome anyone remotely interested to dive into Avatar: Macai's Journey. It is a fan spinoff of Avatar: The Last Airbender. Here is the synopsis:
Macai, son of General Eyre, is trying to live up to his family name by becoming one of the greatest Fire Nation leaders of all time. His father constantly pushes him to be the best warrior and officer he possibly can be. Despite this, Macai has an internal conflict within him that he will need to overcome to be his best self.
Macai has also romantically fallen for Princess Azula of the Fire Nation. This attraction gives Ozai a reason to use Macai as his own personal tool. Ozai doesn't care for the relationship but, seeks to test the young man to see how useful he might be in the future. Avatar Macai's Journey