That might actually be pretty cool..
Really, 20 years later ? They could do something like that, but I would be upset to being able to see the evolution. But, that's a good idea, I guess I would like some details about Katara and how she will perish, will it be a heroic fight, a story about zuko's mom. She is the main character still alive from the last books and I don't want to see her dead already.