No, that would be completely against tradition. It wouldn't even be a real Pokémon game anymore, it would be a fan-game.
Honestly if GF ever broke the original Fire/Water/Grass trio, I probably would actually move to Japan, live there a few years until I receive my citizenship and then while touring GameFreak I would bomb the entire perimeter as well as myself near the foundation, collapsing the building and killing everyone inside.