Haha, you're reading too much into this picture. It's probably just a design trend Nintendo have with Zelda. There was a theory that Midna was evil last time around, because of her one eye thing going on and a lot of Nintendo's villains had that trait at the time. I mean:
So I wouldn't be all that bothered with it.
Looking at Link's hand, for all we know, he's probably going to harness some lobster abilities. :/
When I said, "Look at Links hand." I was trying to point out that he has no sword.
And I'll bet with all the money I have that this girl is the master sword. I haven't a doubt.