This is obviously fake and I'm going to denounce it immediately. This image was on Deviantart several years before the release of the Wii U, which already kinda proves this false. Not to mention it doesn't even look like official art at all. It doesn't even match the art style of what we've seen...
This all sounds fine and dandy. I like the sound of all of it, but one thing doesn't sit right. I think you mentioned that Twilight Princess Hyrule was an island. Is that true?