Coming to the Nintendo Switch on August 24, 2017 in Japan is One Piece: Unlimited World Red Deluxe Edition (say that five times fast). This was announced in the latest issue of Weekly Jump.
This game is an updated version that was originally released last generation on PS3, Wii U, Vita, and 3DS. The Switch game will include all of the DLC and supports two-player offline co-op multiplayer.
No announcements have been made for a release in North America. But, E3 is just around the corner and we might hear something there. If not, the Switch is region free so you could always import or download from the Japanese eShop if need be. We’ll keep you posted!