I think it would be best to see what happens if a real war went on. The avatar would be older and the theme would be slightly more darker which will have a slightly more serious story. But that was just Last Airbender but, more lighter I guess and it followed everything outside the battles. So basically I hoping for is the Avatar to be like Avatar Wan scene where they're actually fighting in one? (wasnt that Korra too? I must like violence then strange >.>)

Prequel version of that would be good, but if this was a sequel then it would be nice to see how technology has effected the Avatar World in the next war and the situation of the United Republic Nations