Too many teams!
Maxima, Leona, and Chin will be a solid start, most likely.
Hwa, Vice, Takuma, Robert, TERRY, Clark, King, Duo, Betty... these all (and probably more!) are possibilities, too.
I'll really miss Blue Mary as well. Need some Real Counter -> Real Backdrop! If she makes it, she'd probably fit into each and every team variation I'd try to make...