I'd love to hear more about your AUs or TMNT OCs if you'd be alright with answering that!
The main AU I mostly play around with is a conglomerate where it's all mixed in with mostly 2k3, IDW and some Rise elements whether that's characters or worlds/settings! It's been kinda fun where it's roughly after season 4 of 2k3 before it melds and transitions into IDW and Rise story beats later! But this also has TONS of OCs that my buddy @sakuracards (Peachy) and I mixed up together in this version with the turtles! Like Alice who's a ex-Y'lyntian mutant slave, Peachy's fan made version of Mona Lisa, a bishop experiment, plus the kids that act like a next generation after the turtles with Cherub (Mona and Raph's daughter), Kevin and baby Angie (Alice and Don's kids), and their human friends, Hibine and Illana! There's so many to list, it's really turned into a thing on it's own and we affectionally call them mutant family, because it's gotten so out of hand. (I'm also currently working on a AU where my OC gets swept up with Big Mama (Rottmnt)'s shenanigans with her assistant...lots of drama. hehe.) I'm working hard with peachy to make a seperate account soon so that we can share all of our lore for mutant family! It's just a lot of characters to organize first so that it'll be easy to follow.