Nintendo of America has announced the following:
"During the next several months, Nintendo expects to launch new titles in
the Mario Kart (Wii U), Super Mario Bros. (Wii U), Wii Fit (Wii U),
Pikmin (Wii U), The Legend of Zelda (Wii U and Nintendo 3DS), Mario
& Luigi (Nintendo 3DS) and Pokémon (Nintendo 3DS) franchises."
This leads us to believe that Mario Kart U, Super Mario U, Wii Fit U, and Zelda U will be releasing by the end of this year. Zelda U hasn't even been announced at all yet, and MK and the Mario 3D game have only been hinted of new information. So it's kinda strange to see they'll probably be released this year.
"During the next several months, Nintendo expects to launch new titles in
the Mario Kart (Wii U), Super Mario Bros. (Wii U), Wii Fit (Wii U),
Pikmin (Wii U), The Legend of Zelda (Wii U and Nintendo 3DS), Mario
& Luigi (Nintendo 3DS) and Pokémon (Nintendo 3DS) franchises."
This leads us to believe that Mario Kart U, Super Mario U, Wii Fit U, and Zelda U will be releasing by the end of this year. Zelda U hasn't even been announced at all yet, and MK and the Mario 3D game have only been hinted of new information. So it's kinda strange to see they'll probably be released this year.