i did a very similar art project in college a couple of years ago. as it was art-based (more of an excuse to draw lots of batman
), i felt the need to keep the teacher "sweet" by adding as much art references as possible. so it might be an idea to start looking at Kane/Fingers original inspirations such as Leonardo Davinci's bat wings...that sort of thing. also, even though it's widely regarded as a low point in the batman franchise, the schumacher film costumes - nipples and all - were inspired by greek sculpture and the relation to superheroes by glorifying the human figure...so i did some sketches to back up and reinforce my work.
just a suggestion