I would like to see a Zelda game with less big open spaces with little to nothing to interact with. This was a big problem with the overworlds of the last three Zelda games. In Skyward Sword, they could have had stuff populating the overworld by unlocking things down on the surface area. That would have made things much more interesting, but for the most part it was a very empty experience. Wind Waker had a giant overworld ocean with very little to do in it except move. Twilight Princess had BY FAR the most boring iteration of the Hyrule map of any Zelda game ever.
Make something with a lot of substance, sites to see, and things to interact with. Link to the Past, Ocarina opf Time, and Majora's Mask are all more fun than those next three Zelda games. Although I think Skyward Sword was a nice step in the correct direction for the series with the item collection, there are just a few things that needed to be added/removed to make the game a masterpiece. The motion controls, I found, broke very often and needed re-calibration. Skyward Sword felt like a PC game that I could have had more fun with if I had a gaming controller, but because I had a keyboard and mouse the game was less interesting.