I say stick with the original costume. It's worked forever and it will help bring in a male demographic with the T&A. If that gets too much, go the Smallville route. Clark never wore the red & blue superman costume, yet it seemed to work.
Doubles's forum posts
Let me throw a complete different theory out there. Expanding on the idea that he helped direct Jason Todd to become Robin - take the 1989 Tim Burton movie as a vehicle. Jack Napier, pre-Joker, killed Thomas & Martha Wayne, thus helping, in a twisted sort of way (which is the only way the Joker would operate), create Batman.
Using this theory, not only does he know that Bruce Wayne and Batman are the same person, he even helped create him. He did it to have someone to challenge him. Thus the reason why he will never destroy him. Both Batman & the Joker rely on each other and need each other too much to ever destroy the other. You can't have peanut butter without the jelly.
Hope I'm not too late. Very new to this site and loving it. Saw this contest today and decided to give it a go. Was watching ESPN and trying to come up with an angle when inspiration hit me. Why not combine two "villains". Hope this works with the out there and anything goes. Needless to say, I took some liberties.
Breaking News: To coincide with Green Lantern now being a gay superhero, he'll also change his name to Chartreuse Radiance. #ComicBookFail