So as I'm sure most of you have seen the new Skyward Sword clip at the end of the anniversary video. Now, one of the things that caught my eye that I haven't seen discussed yet is Link's speedboat.
As you can see at around 5:00 minutes in, Link is in a boat on a large body of water with sand in the background. Now, my first thought is that this is just a part of the desert area they keep showing, but upon further thought, why would there be a huge lake in the middle of the desert?
My new thought is that there may be infact, a small ocean of sorts in the land below. Now, this has to be a pretty big body of water if you need a motorboat to traverse it. The sand we see in the background could very well be a beach.
Not tryin' to confirm anything, but ever since I swam in the Great Bay in MM, I have wanted a beach/ ocean to go along with a land overworld.