This is basically a recut trailer for "Suburban Knights", a fun little indie film produced by ThatGuyWithTheGlasses.com.
I tried to match this as closely as possible, but not every character interaction was able to work out. Still, I hope you enjoy it!
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Sokka: The Nostalgia Critic/Link
Ty Lee: The Nostalgia Chick/Arwen
Katara: Obscurus Lupa/Snow White
Teo: 8 Bit Mickey/Peter Pan
Appa: Bennett The Sage/Aslan
Chan: Handsome Tom/Willow/Sir Not-Appearing-In-This-Trailer
Zuko: Linkara/King Arthur
Haru: AngryJoe/Inigo Montoya
Mai: The Cinema Snob/Indiana Jones
Suki: Film Brain/Harry Potter
Yue: Luke Mochrie/Harry Potter
Jun: ToddInTheShadows/Dread Pirate Roberts