I owuld like to see more mountains and lakes. I think that they would look amazing with the Wii U's capabilities. A giant prairie or a meadow would be an interesting addition, a place where Link can relax and take his mind of the difficult quest he must complete. Also, if they include Hyrule Castle, I would like to see a large Castle Town, full of people, like the one in Twilight Princess, so it looks more lively. As other people have already said, a haunted area would be a great thing to see, which could lead to different enemies and items.