Yeah, and they made Katara Padme along with Zuko being Anakin. The Hell? If anything, Aang should be Han, and keep Appa as Chewie. Katara would be Leia, Zuko as Lando, Iroh probably works best as Yoda or perhaps Old Ben. Momo is actually a hard fit... maybe Artoo? And finally Sokka would be Luke, with a Light-Boomerang. I think this is much better, and no prequels were involved. Win Win.
Edit: And Toph would be Mara. Even though she's not in that picture, I couldn't leave her out. (Or miss a chance to ship Tokka.)