Avatar: The Legend Of Leo

The Death of Avatar Korra leaves a big mark on the world. New conflicts begins to rise in this New Age.
The New Earth Empire rises and becoming more advanced and powerful and also very aggressive that they ended up splitting the Earth Nation into 2 seperate countries. The Earth Empire is on the north which their capital is now Ba Sing Se and The Earth Republic is on the south which holds Zhao Fu and its capital is in Omashu.
Science Revolution is going strong on Bending and Living in general (like technologies and stuff) Thanks to Future Industries International (FII) for doing it.

Although, its not entirely great because a scientist called Kaijin, has developed an Artificial Bending which requires spirit energy from spirit vines, convert them into liquid and inject it into someone, opening their chi path so they could bend elements, but it's discovered that it's not safe at all as it still has some serious side effects. Kaijin is dismissed from the International Scientist Association (ISA) and now is working with The Earth Empire so he could experiment more with it.

The White Lotus is now dealing with Kaijin as he is trying so hard to commercialized this "Artificial Bending" to public thus making them to search for the new Avatar.

Searching in the whole Earth Nation on both countries and doesn't get any results but After 16 years, one country that expected to be the land for nonbenders, United Republic, a small family lives near the spirit portal. The white lotus finally find the Avatar. His name is Leo and his journey to restore balance starts now.

(I don't own anything about korra but the whole story is 100% mine but inspired by the cartoon to make a different world from the legend korra)