Super Smash Bros. with GameCube controllers, Nintendo announced today.
The peripheral allows players to connect up to four GameCube controllers to the Wii U via a USB dongle. Nintendo has not announced whether WaveBird wireless controllers are supported, or if GameCube controller support is planned for other Wii U games.
Smash Bros. brawlers have plenty of input options to choose from, including Nintendo's own Wii U Pro Controller, Wii Classic Controllers, and PDP's upcoming Wired Fight Pad. The Wii U version of Super Smash Bros. will launch this winter.