I love AtLA! Never got around to seeing all of Korra though. I blame the scheduling from when it was released. I could try Zuko, although it's been a while since I've seen all of the series so the accuracy and quality of my RP probably won't be as good as it could be.
I was gonna ask if we could do that Star Wars rp, but it seems you've found a partner for that already. Oh well! Hope you guys have fun. If you end up using a 1x1 thread for it instead of roleplaying in PMs, I might just watch the thread if that's okay. It really sounds interesting.
I don't know much about the Marvel universe, whether from the comics or the live-action movies, but a SuperheroxSupervillain rp sounds nice. I have a general supervillain rp character I can be, although I haven't played as her in a while, and she's based on a prexisiting character from something...
Looking for a 1x1 roleplay for a few things, reply with what you're interested in.
Steven Universe
Plot: You are being escorted to the tropical planet of Adelaide Major by a Tiger's Eye soldier, a gem of a lower social standing than you, but this one was highly praised for her precision...