Welcome to a darker world of ATLA where Lu Ten still died but Iroh became vengeful and the Fire Lord, in this world Iroh has countless concubines, a son called Wong from one and enforces the Fire Nation with an iron fist. Women are treated poorly and worse, Iroh is willing to continue imperialism. Best of luck in this universe if you are any of the Gaang or anyone else. Most of all Azula, never ask about Lu Ten around Iroh or be burned and banished like Zuko was by Ozai in the show.