It reminds me a little bit of the vision provided by the original Legend of Zelda with a world design akin to Shadow of the Colossus. I'm hoping for a seamless world with seamless transitions between over-world and underworld, with a story-line that induces strong themes (similar to MM) enhanced by side-quests that add to the main story's message. I also what a plethora of challenge dungeons (i.e Cave of Ordeals, Savage Labyrinth, etc.)
Also I want the "more enemies at night-time" thing to return.
From what we've been told and seen of the game, I don't think I'll be disappointed.