"Somewhere"? Bro, you're pretty damn slow. He's been in all the gameplay and cinematic trailers for some time now, Ghirahim. People have been debating whether or not he has anything to do with Vaati; considering he isn't a Picori or whatnot, and they really don't look that alike, I'm voting no.
Yes, beware of spoilers as you tempt everyone with a link. on a side note i think that the Wind fish might be involved, I say this as I look at the whale thing that ate zelda in one of the trailers for the game.