First off, it needs a border. The text looks really weird.. you're probably better off without any text at all. But I really like how you blended the picture, it looks great. The right side of the sig could use the same saturation as the left side as it seems a little bland in comparison now. And maybe do some light opacity brushing over the black spots?
Reminds me more of Clark Kent from Smallville than Spiderman (probably because I remember seeing a sig similar to this one with that character). I don't really get the sense that it has anything to do with Parker.