>>63
>but a part of the big baddie
What do you mean by that? I'd say that the possibility of it being a new Pokémon isn't low, seeing as mons from a later gen have often been revealed in the gen before them. Honestly, though, it could be anything.
But if we're getting a mainline game, I wonder which team of GameFreak is going to be working on it, seeing as they're currently making Tembo the Badass Elephant.