Going to post this here since I have a feeling this might change a little, but...
I think I might have sorted something out for Akiho? Keeping with her original motivation, obviously, which will leave room for character development, blahblahblah, but still might incorporate Jeong Jeong and the deserters somewhere? I imagine that maybe Aang never properly encountered him, not to learn firebending at least, maybe learning firebending from somewhere else.
- Akiho is quite unskilled with her firebending. After realizing how the bad the war actually is and that there is a chance for her to do something and contribute to bringing peace, Akiho could possibly seek out Jeong Jeong for some training. Kind of appropriate considering they are both deserters if Jeong Jeong is largely the same in this canon. This really depends if we wanna drag someone along as well, one of the main characters or even a side character, or alternatively Akiho could do this alone for whatever reason.
- Could tie in with the Order of the White Lotus, Ba Sing Se, etc. I suppose that all really depends if these things are effected in this universe. I guess we'll cross that bridge when it comes.