Sozin's Comet

They announced season two and three cast all at once because they shot it all at once.

So we didn't know for sure if she would just be in Sozin's Comet.

But she wasn't.

She was here to discuss with Aang about the Avatar estate.

What now? What's your theory about what destroys the world?

I think it's going to be Sozin's Comet.

It's going to come back around again because when it came back at the end of the series, it looked as though it was very, very close to actually impacting the world.

I think Sozin's Comet is going to come back around again and it's going to impact the world.

Okay.

Yeah, it does look a bit dark.