I confess I was a lot more enthusiastic about the so-called "movie season" before I found out it was live action. And apparently being directed by M. Night Shayamalan who manages to strike out with me every time.

As for Iroh, I was certain they'd run into him for the first time in a battle somewhere. I had it all worked out in my head!

Aang: *firebends* "Oh! General Iroh!"
Iroh: "Avatar. I see your firebending skills are coming along nicely."
Aang: "Really? You think so! Thanks!" *over his shoulder* "See? I told you-"
Zuko: "He's being polite. You suck. Hello, Uncle."

And then they fight crime Ozai together!