I really keep coming back to this one. I think you've got a really great looking Green Arrow, it's a good style for the character. He's got like this urban ninja thing going on. He looks designed to be stealthy... except he's a got a freaking neon billboard running across his chest.
That ambient glow as a light source is a really cool effect but in this instance, it feels contrary to the impression being made... unless you were to give him a glowing green arrowhead on that arrow and call the piece "Hunting Superman"... now that would be pretty cool.
Good job.