I think that area from the E3 trailer doesn't exist anymore, or it was changed to what we saw at the beginning of the TGA gameplay video.
Why do I think that? Well, usually unique natural structures are only used once in world maps. So notice how in the E3 trailer there's a mountain cut in half by a waterfall?
It's easier to distinguish if you watch the video, but it's right above link way in the background.
Look at the same type of natural structure to the right, just as Link goes up the edge.
I really doubt they would use that twice, for the reasons explained about.
So I wouldn't be surprised if that area was completely redesigned or removed by now. It wouldn't be the first time they've done that. Anyone remember the awesome dense forests from Ocarina and Twilight that never made it into the final game?