Aside from being in 3D, One Piece: Unlimited Cruise SP has a Marineford mode. Shonen Jump reports this covers the arc where Luffy rushes to rescue Portgas D. Ace in navy headquarters, Marines.
One Piece: Unlimited Cruise SP comes out in Japan on April 7. Plans for an international release have not been announced, but Namco Bandai Games Europe localized both One Piece: Unlimited Cruise games and picked up One Piece: Gigant Battle. Perhaps, PAL regions will get a chance to play this?