Think about it, if Ozai and Iroh are brothers, ont they need to look similar, or will Ozai be an older form of Azula/Zuko(Who are basicly a generic face with differnt markings).?? I mean somehow I don't picture the Fire-Lord being an old fat guy who "Cries over spilled JAsmine Tea", and is good for nothing but heating water and teh occasional short battle "the Seige of the North"