Um What? A new plan of a game? If this is a hint towards Hoenn remakes then they must be thinking of how they are going to retell the Story because of Emerald version being the canon game. That's the most probable reason besides creating the plans for the next Generation.
Kanto is a possibility also, but I don't see why they would need to create a new "plan" for it's second remake.
Edit: And I just noticed and wanted to point out, he says "A game" not "games", like what they said in HGSS for it's remakes.