Meh, I guess, but still, speculation. And the Anime continuity doesn't equal the Game continuity.Considering it's a whole new region, meaning it's not from Kanto. Not gonna happen. Besides, we know how Mew was cloned from Mewtwo's side story in the anime.
(Anyways, wasn't Mew cloned in South America, and not Kanto? At least, according to the journals in the Pokemon Mansion? Maybe since Pokemon games try to take place in areas similar to real world countries, the region would be based on the place Mew was cloned.)