Aside from the recently announced Zelda: Wind Waker costume, there are also costumes based on characters from Ghosts n’ Goblins, Okami, and Strider that will be featured in Monster Hunter Generations. The Monster Hunter series is no stranger to having guest-character costumes. In Japan, Monster Hunter Frontier G had costumes and weapons from Fate/Stay Night. Monster Hunter 4 Ultimate also had the original Dante’s clothes and the sword Alastor from the old Devil May Cry.
The DLC is set for release as free DLC on July 15th, the same day Monster Hunter Generations hits the 3DS. If you are unable to wait, you can always check out the demo on the eShop.