Square Enix has announced (via Hachima) that the (currently) Japan-exclusive MMO, Dragon Quest X, will be coming to both PlayStation 4 and the Nintendo Switch this summer, with the Switch version possibly being delayed until later in the fall. Beta tests are being planned for the two versions, likely at separate times.
Along with this announcement, however, Square Enix confirmed that support is ending for the Wii version of Dragon Quest X when the PS4 and Switch versions launch. A new campaign will be made for the Wii version to help players transfer their data over to the Nintendo Switch.
Dragon Quest X isn’t currently available in the west, but Japanese versions are available for Wii U, 3DS, iPhone, Android, and PC.