Hi Jessica, I'll try to find what you're looking for. There's a site I used to go to for all things Batman. I've forgotten the link for it though. When I find it I'll post it here for you.
If you know of any 80s cartoon concept art, character design sheets, etc. I would be very glad to have links them. Check out this link to find out what I'm looking for. "Kidd Video & Jem and the Holograms Model Sheets Anyone?" http://www.drawingboard.org/viewtopic.php?t=74174
And, if you know where I could find Rainbow Brite and, The Shirt Tales visual development art that would be great as well. Thank you so very much in advance.