Book Two Earth: The Cross Roads of Destiny, The Road to Dawn

What if Zuko joined Team Avatar at the end of Book Two? An alternate ending for the 'Cross Roads of Destiny'. Zuko chooses to fight for the good of the world and to stop the Fire Nation alongside Aang and Katara inside the crystalline catacombs beneath Ba Sing Sei. He faces off with Azula and the outcome doesn't bode well for the banished Prince or the Avatar.