Speaking with investors during a Q&A session, Miyamoto said that Nintendo is attempting to "evolve the series" and reached the halfway point with The Legend of Zelda: A Link Between Worlds. While the company is continuing the structure changes with Zelda on Wii U, Miyamoto said there are also secret ideas brewing for another series entry on 3DS.
http://www.ign.com/articles/2014/07/04/nintendo-hints-at-another-legend-of-zelda-game-on-3ds