Out of nowhere, NES Remix dropped today on the Wii U for $14.99. It's basically a WarioWare-like collection of minigames from various NES-era titles, with some challenge-centric goals and a few remixed levels (like Luigi in the original Donkey Kong).
$15 is pretty steep, so I collected a heap of gameplay from my playtime today, so you can get a better look at what it has to offer. As a side note, you cannot access the full games in NES Remix -- it even has a comedic NES Zelda "buy somethin' will ya!" eShop ad at the bottom of the game's menu.