Wolf-Link Amiibo Info Leaked
Apparently There's a New Dungeon in "Twilight Princess HD"
Thanks to NeoGAF, they found and translated the France Amazon page for "The Legend of Zelda: Twilight Princess HD." There it states what the Wolf-Link amiibo does - it unlocks a brand new dungeon.
Unlock bonuses with "The Legend of Zelda" amiibos: Tap all the amiibos for the Zelda series to unlock bonuses in the game, such as regenerating your life, or getting arrows for your bow. The new Wolf Link amiibo even allows you to get into a new dungeon: "The Twilight Cave". The data recorded on this Amiibo can even be transfered to the next episode on Wii U.
The "Super Smash Bros." amiibo, Link, Zelda, Sheik, Toon Link, and Ganondarf, help Link in terms of giving him health and restoring arrows. From what the description says about "next episode," it most likely means the working title of "The Legend of Zelda Wii U." "The Legend of Zelda: Twilight Princess HD" will release on the Wii U for North America and Europe on March 4, 2016 and for Japan on March 10, 2016.
Source: NeoGAF