Childhood Hero's self portrait

So I'm back in school now, and I thought I'd post up one of the assignments I've gotten for my Children's book Illustration class. Basically we have to do a self portrait that also includes our child hood heros. So growing up watching Ninja turtles and Batman: TAS, I figured I'd work those in some how. I've included all the stages of the process here just to give you an Idea of how I work. Heres the initial concept sketch's and thumbnail, the penciled image, a inked lighting study, the coloured piece, and the final finished image.