I feel like the main formula of 7-10 dungeons is pretty well established. I want to see more fleshing out of characters and more insight into the lore of Hyrule. That, and the mini-games from older titles are just awesome. I feel like more additions to a game's sidequesting can make it more fun and memorable. MM is obviously the ultimate example of side-questing done right, and it seems fitting that the series continue the tradition. My one fear is that they won't be done right and be either too hard or tedious, like a lot of WW got for me. It's the Big N though, so I think they could pull it off.