This is a recently-inked tattoo by artist/Geekologie Reader Adam M. based on a painting of the same design by Alex Ross (links to picture on Alex's website). Damn, I didn't know Batman's back looked that bad. Don't get me wrong, I still have a crush on him, it's just, I dunno, I'm not sure I could shower with him now.
Thanks Adam, remind me to give you a holler when I get my next dino tat (I'm up to #8!).