Oh no yeah, I definitely see Jigglypuff getting a new side B like fairy wind and Mewtwo or Lucario to have Mega Evolutions and all. I was just really torn on Pokemon Trainer...I originally said Kalos but then went back to Kanto since Kanto Starters, Pokemon Origins, and Mega Evolutions, but I just figured Mega Evolutions had been covered by Mewtwo or someone else so...maybe they'd want to feature actual new pokemon? And after the strange treatment a seemingly inevitable Pokemon reveal has gotten, Im very suspicious on a 'Newcomer!' simply since we havent seen another since E3 and cant even begin to make a pattern on how they work. Perhaps they can break rules and be announced on weekends! I dunno! But with how Sonic's WARNING sign is gone and a brand new pokemon game is coming out on pretty much the exact day Sakurai likes to reveal characters I cant help but feel suspicious that a newcomer is coming! But who is a newcomer?
Not Jigglypuff, not Lucario, not Kanto Pokemon Trainer... but Mewtwo technically as he was in retirement in Brawl, or someone we haven't seen before at all...like Kalos Pokemon Trainer. Seeing as Mewtwo was, and I think should remain, unlockable, I can only see it being a trainer since thats the only other Pokemon starter we've got in the series.
That's my full logic on why I think Kalos Trainer is the next character to be revealed! Sorry for the essay XD