i'll post a new roster soon because now i feel like it thanks to you guys |:
Also yeah Sonic New World does look good. SONIC XTREME/GALAXY... Yeah I'm excited.
I think the thing with overrepresentation on the big three is also that it has to be interesting and fitting. There's problems with all three, really. Mario can have Toad, Bowser Jr, or Paper Mario but it has a problem of having a hard to decide factor (To this day I'm still on the fence about all three, especially the former two), Zelda does a lot of Flavor of the Week, and Pokemon already has a lot: Really just keep the same as Brawl's roster and add Mewtwo
Personally, I'd say add nobody to Zelda (Or maybe Toon Zelda/Tetra; I wouldn't mind that), bring back Mewtwo, and throw in one of the three for Mario. That sounds pretty fair.
edit: also while PT is technically three characters its also technically not since switching needs to happen quite a bit when using them