There are probably no good pictures because it is an unrelased game, and so therefore, any Zelda Fan can't ripp or find a better quality model. All pictures are going to be based on what has been released so far.
Though Zelda Informer or Zelda Dungeon is building a big wiki on it and they do have the full body scale of Zelda HQ. I just can't remember the blog post at the moment.
Well I know this is one of the pages, but I remeber they had a whole character page. Oh well, at least the images are there: