It seems that the trailer shown at E3 was a shortened version of a previous trailer that, obviously, wasn't shown at E3.
IGN, however, was given to chance to watch and did. They weren't allowed to bring cameras or anything, so there's no video or audio, but they did write a detailed report on it. There's no new information that we didn't already know about that can be taken from IGN's article, but it is interesting none the less. I expect we probably shouldn't have to wait too long until Nintendo releases the whole to the public. I think no more than a couple of months....
Anyway...
Link:
The Legend of Zelda Extended Trailer
*shrugs and walks away*