A new trademark filing in Japan has been made public for “Pokémon Game Factory” (ポケモンゲームファクトリ) and a tentative logo. What exactly it is remains unknown at the moment and may not be a game for the Nintendo 3DS or Wii U. It was filed in the ‘Toys’ category. More information as it becomes available.
The title suggests that if it is released it could involve some sort of player-created content, which would definitely be a fun addition to the series. What do you hope it might be?