I wouldn't mind a not-F2P Rumble game for Switch. Rumble and Rumble World are completely brainless, but they're still mildly entertaining and the setting of Pokemon makes the collecting aspect both inherent and compelling in and of itself. Although, considering Rumble World already exists, a new game in the series outside of pay to win phoneshit isn't really necessary, if anything they could port Rumble World over to the Switch and call it a day