This would otherwise disprove that theory:
From the wiki:Amon was born on a small farm to a family of non-benders; nonetheless, they were extorted by a firebender. When Amon's father eventually confronted their oppressor, the firebender killed his family and severely deformed Amon's face, forcing him to "hide behind a mask" ever since.
I honestly doubt that either Zuko or Azula fit that description.
I support this, but I don't doubt the possibility of it actually being true.
So far I'm really liking Tenzin. He's a pretty cool guy.
Lin's got an interesting character design. Really like the metalbending though.
On another note, does lava belong to earthbenders or firebenders? (This just occurred to me today.)
Lavabending is a combination of both fire and earth bending, it is only possible by avatars. There was a small part in The Last Airbender which showed the most recent fire avatar lavabending.

















