In terms of the areas, I hope that they aren't small. For example, Drac's castle. In CoD, that castle only seemed to be a spiral consisting of seven floors and a basement. If you ask me, it was a big let down. Hopefully, each area in OoE will be a decent size and not repetitive. I also hope that there are some interesting bosses. As of now, we only know of maybe four of them: the insect thing in the monestary, drac, the large crab (shown in the first trailer), and what looks like a water deity (seen in another trailer).
From what I've seen, this game looks like it's going to be awesome. I can't wait. The release date is October 21, right?