I think that you should add team avatar to it. Aang, Sokka, Katara, Toph and Zuko and that would add more balance to it. Not only because we should show all the characters but because of the elements as well. Because you have Toph in the picture it nullifys the fact that Aang is the avatar and makes him represent an airbender instead of all of the elements. With only an earth bender and an airbender now we need fire and water as well. Hense Katara and Zuko. As for Sokka I feel like we need some boomerang action just cuz I'd feel bad if he was neglected.
But seriously GREAT JOB!!! I love the graphics heart I also love the element symbols as well