[] [Time] During Great War: You will replace Aang; born at roughly the same time as him.[/Time]
Sooo how can I imagine that option, because there are certainly ways to interpret it, given how long the Great war was and how long Aang was involved in it
1. the Basic option (future), Aang never was the Avatar, instead our Character was, which makes us an Airbending Avatar and we made the same decisions Aang did, leading to us being sealed into ice, leading us to the canon timeline
2. the Basic option (past), Aang never was the Avatar, instead our Character was, we didn't run away and were trained when the Fire Nation attacked the Air Nomads, thus are now an Avatar 100 years before canon
3. the Advanced option; Aang was the Avatar, but never run away, instead got killed and now we are the next Avatar, as a Waterbender 14-20 years after the start of the Great War
4. Ironman mode, Aang was the Avatar, but never run away, instead got killed, as did the Waterbending Avatar after him and now we are the next Avatar, an Earthbender and are 20-60 years after the start of the War, but in a world without Airbenders, which is also our most difficult element to master