>>13061161So then, let's break this down. The "well known game, played all around the world" bit is either in reference to Pokémon or this other partner's game. Pokémon will more than likely be involved in either case, as the only other gun in GameFreak's holster is HarmoKnight, and I doubt that has anything to do with it.
So, that's the question; are we looking at another crossover a la Conquest, or is this mysterious partner collaborating on X and Y? In the case of the odd silhouette, one would think it's a new monster at first... but what would revealing a new mon serve in debuting this new collaboration? This is all very interesting. It may very well be related to this August's big scoop.