Imported One Piece Burning Blood for the Vita, because there's no physical release coming out here (just PS4 and Xbone, IIRC). The game will be available for PC in the States, too.
I've only had a chance to play a little bit of it, but I'm impressed-- this is a simplistic, arena fighter-style game, but it plays very smoothly and looks nice enough. You have two basic attack buttons and can do different attacks (ranges) by hitting up or down. There's a guard button that can also be used to side-step, a jump button, a special attack button (hit L plus Square/Triangle/Circle for special moves), a powered-dash button with R, and you can equip assist characters and use them with the d-pad. When your meter is full, you can then use the right analog stick to unleash super moves. The game lets you select up to three characters to use in battles and you can switch between them at any time. Button combinations also give you two types of guard breaks.
There's a story mode and various offline battles you can engage in to earn money, which lets you unlock more content, including characters and assist characters. You can also level characters up, but I'm not sure what this does yet. It also offers 4P online versus (ad-hoc is up to 2P) and has PSTV support.
The game reminded me of J-Stars Victory Vs. in previews, but it plays much, much better than that game did. Everything feels more responsive and smoother. The game doesn't run at native res on Vita during battles, but still looks pretty nice. I'm tempted to get it on PS4, but am holding off for the domestic release next month.