New Super Luigi U

New Super Luigi U is upcoming video game for New Super Mario Bros. U. It is described by Satoru Iwata as "Full-Scale DLC similar to the production of full software". This is one of the 3 projects released for The Year of Luigi. The game will be sold as both DLC for New Super Mario Bros. U, and as a sole retail release few months later.

e-Shop
The DLC version is single-player only, and focuses on controlling Luigi throughout the whole game. These appear to be all-new levels, designed specifically for use of Luigi.

Wii U
The official version features Nabbit, an additional character. Mario is excluded from the game, and the game is harder due to the 100-second limit.

Trivia

 * Interestingly, the box case is green instead of usual blue. This to reflect the colour of Lugi's overalls.