The system library is actually not much like the GameCube's first year at all.
The GameCube had: Luigi's Mansion, Pikmin, Wave Race: Blue Storm, Star Wars: Rogue Squadron II, Super Smash Bros. Melee, NBA Courtside 2002, Eternal Darkness, Star Fox Adventures, Super Mario Sunshine, Animal Crossing, Metroid Prime and Resident Evil 0 and REMake as notable exclusives.
The Wii U has: New Super Mario Bros. U, Nintendo Land, LEGO City, Sing Party!, Pikmin 3, Wii Party U, Wii Fit U, Wii Sports Club, Wonderful 101, Super Mario 3D World, Game & Wario, Mario & Sonic Sochi Olympics, Zelda: Wind Waker HD, Zombi U, as notable exclusives.
The Wii U has considerably less diversity -- tons of emphasis on party/mini-games (about 50% of their exclusives!).
It's obvious to me Nintendo was trying to recreate the Wii launch with Wii U. NSMB is supposed to be the big Nintendo IP that brings in Nintendo fans (like Zelda: TP). Nintendo Land is supposed to bring in the Wii Sports audience and demo the controller. Zombi U was the token third party 'hardcore' game (see: Red Steel).
In actuality the Wii U is not performing anything like any previous Nintendo console. It's far worse than the GameCube right now.
