Sorry to burst your bubble but these aren't really new. These are the official character artworks revealed about a week ago. The first one looks fishy, though. I'm guessing it's fanart, or maybe a render, but it looks too dark and matte-like to be an actual render from Skyward Sword.
Great finds! I especially like the Tentalus, Fi, and Ancient Robot ones. Not including the Zombokoblin because that is the freakiest enemy I've ever seen.
Yeah Katelynn, these aren't new, we already seen the the second and third one, the second one was already posted in the Skyward Sword Walkthrough in the boss section, the Fi one I already saw.