In a stream from Bandai Namco, they announced that another One Piece game is in the works. One Piece: Bounty Rush will be released for iOS and Android devices. The game is slated for 2018 and will feature 4v4 matches. So far there is no information regarding if the game will be released in other territories, as for now it is exclusive to Japan. Take a look at the trailer below.
The game is to be free to play with in game micro transactions. In the trailer you can see which characters will be in the game so far. Luffy, Chopper, Zoro, Usop, Sanji, Robin, Nami. Im sure the rest of the straw hats will be added as well along with some notions villains.
On the official website the different characters that will be in the game, will be categorized with different classes. More information is to be revealed during the Jump Festa even that takes place December 16-17th.