After Breath of the Wild, I wouldn't mind a return to the linear formula, with some open world aspects like choosing your own dungeon order. So more or less, Link Between Worlds but with higher production values, full scale 3D, and still multiple ways to solve certain puzzles. Making Zelda open world all the time would become tiring I think. The same way Making Mario a free roaming game all the time got stale and they went to the Galaxy and 3D series.
I'm all for Nintendo improving upon Breath of the Wild's art style too. The game is drop dead gorgeous, aside from some expanded textures resultant of the Wii U port. Either way, I can't wait to see what's next. But even before this, we're getting DLC.