Bandai Namco announced a cross-match update for the One Piece Dai Kaizoku Colosseum and the Dragon Ball Z Chou Kyuukyoku Butou Den Nintendo 3DS games. The Dragon Ball Z game already available in Japan (and in North America and Europe) but the new One Piece game just release only on September 21, 2016.
The cross-match update means that the games can be linked and you can fighting against with the different story characters each other. So a One Piece character vs a Dragon Ball character and you can even select a stage from the other game to play on.
The update release in 2016 November in the Nintendo eShop (Japan) for free but the exactly release date is unknown. Stay tuned for more information!