This is awesome! Joe Mad is the man and so are you! I would love to see you do some comics, you could bring that rare level of fun and dynamism to comics that Joe is famous for and is so sorely lacking in today's books.
Cool man. The only part I see that looks like Joe's style is the trim on the collar and at the end of the gloves. Either than that, you totally made it your own from what I can tell. Looks great Robin!