There's already a ton of character customization options in the newly released Tekken Tag Tournament 2 but the Wii U version will be getting fan service of the highest order. Namco Bandai will be releasing themed outfits that turns characters into Bowser, Zelda or other characters from iconic Nintendo games.
TTT2 on Wii U will also a feature a Mushroom Battle mode where the iconic Super Mario power-up let fighters grow to gigantic proportions. If you thought getting your ass kicked by Panda was annoying before, it'll probably be 1000 times worse when he takes up half the screen.