I can see the meeting of Aang and friends with the newly reformed Zuko now:

Aang and friends: OMG, WTF?!!!11?? It's Zuko!!111ONE11!!5

Zuko: No worries, no worries, evil ain't no thang for me no more, f'real.

AaF: F'real??

Zuko: F'real.?? We cool?

AaF: We cool. *does corny, '80s style secretive-type handshake with Zuko*