It wasn't until you posted a preview that it became clear I am left in a strange place. I can analyze and critique prose. Scripts? They're held to different standards, especially where it concerns style. A script can get away with sin in many respects. Therefore. . . I'll gloss over style in large part, forgive vague logistics in fight scenes (those would be the responsibility of director and choreographer), and keep a more open mind.

The series matters for lore. Everything else has to be taken at face value. Even if a scene or line of dialogue works in the series, it may be open for criticism when aimed for a live-action film. Different standards.

I'm left with little to say. I would recommend dragging the tension out once Zuko steps off the ship at the village. Have Aang take longer than he does here. Maybe have Zuko snap his fingers, and a soldier does attack a hut. Maybe the elderly are brought forth shivering.

I don't know why I should fear Zuko as an antagonist, or even take him seriously. Yet. The trio have too much say, too much of the time. And perhaps this is a minor criticism that could be aimed at the series itself.

Write Zuko to be more competent. This doesn't require a major rewrite of what you have, Tack. It requires a few extra lines that could fix what may become a big downfall.

I look forward to reading more. :)