Aonuma says “No one explicitly said that that was Link”. Could be be messing with our heads? Is this character female? Zelda? Someone new? (source)
I personally hope this is Link. Gender swapping a character isn't some grand statement. If Nintendo wanted to make a new kickass female heroine, why not create a new character and build an IP around her rather then superficially alter what exists?
Either way this is my number 1 most anticipated game right now. Looks great so far and I hope we don't have to wait too long to see more.