Hyrule Warriors is coming to 3DS as Hyrule Warriors Legends. Being made by Koei Tecmo, it will include all the DLC from the Wii U version, as well as a few additional characters from The Wind Waker.
The game also has a character switching feature, allowing for more variety in the long battles that are a hallmark of the series. I'm afraid details on other new features are sparse, but one of the screenshots that Nintendo provided features The King of Red Lions taking out opponents with a tidal wave. So that's neat.
Hyrule Warriors Legends will hit 3DS in early 2016.