I'd argue that Zuko is more a "decendant" of the Avatar, instead of "a version of the Avatar".
You know, since he's a fire bender, and the next avatar was supposed to be an Air bender, and also he can't bend the other elements, or do any Avatar stuff with the Spirit World... And how he was never refered to as any sort of "Avatar" throughout the entire course of the show.
Anyway, Zuko didn't create peace dramaticaly. We don't know if there were any uprisings later, or if maybe there was more conflict with the Dai Lee, or anything like that.
Besides, if an earth bender married a water bender, and then they had a water bender, the water bender would not be considered a "version of an earth bender" if all the water bender could bend was stuff a standard waterbender could bend. (Mudbending doesn't count, because Toph and Katara have been able to bend it.)
Edited on 06/19/2009 8:04pm