Since Monday, Namco Bandai and Tecmo Koei have been teasing a mystery project. A couple of rumors about this mystery project popped up, an it appears that many of them were spot on.
The lastest issue of Shonen Jump magazine confirmed that the game is One Piece: Kaizoku Musou. No details were revealed by the magazine apart from one scan. One Piece: Kaizoku Musou will appear at TGS 2011 later this month.