Wow, this is a great picture! It really does work hard to capture Wolverine's essence. I love all the little details, like the blood on his claws. You've created a wonderful atmosphere too. The ripped shirt makes him look, well, ripped. It has a nice ambiguous nature.
While his eyes aren't seen, you can still understand his facial expression. The all capitals emphasize it well. The shadows and darkness are used wonderfully too. I can even see some stuff in the background, like he's on a wall. A very deep picture.