It seems like the consensus is that this game will be like Ocarina of Time but larger and with some new mechanics (Wolf, horse combat, etc.). Sure it is presented in a similar way and you play as adult Link, but the
Spoiler (Highlight to read):
Twilight Realm
stuff seems to show just how different it will be. Nintendo also says there are other things they can't reveal yet. It wouldn't surprise me if this game was very, very different from OOT. It will probably control more like WW and the story is nothing like any other Zelda from what I can tell. Dungeons might end up similar though, and that's a big part of the game.
Anyways, what do you think? Do you think it will be the Zelda most people seem to want, a game very similar to Ocarina of Time, or do you think it will be a very different sort of adventure?