Or maybe just a friendly note to the current copyright holders, if you can find them, as they're the only ones that can legally file a complaint. Regardless of everyone's intentions, it's not legal--in the United States, at least--to make such a complaint unless you are the actual copyright holder or trademark owner. Keep that in mind the next time you feel like playing Batman. ;-)
EDIT
The reason I point that out is this: Let's say you make a formal complaint. eBay removes the auction based on your complaint. The auction holder then proves that yes, they were indeed authorized to sell or use the items in question. You as the complainant are now responsible for all losses incurred by the auction holder as a result of the removal of the auction.
Wayne is obviously entitled to protect his tradmark and copyrights. The rest of us, however, must tread lightly. Also recall that morality is entirely subjective, and the concept of ownership in the American and Westerm European sense is not universal. When in doubt, don't seek your own remedy. Instead, consult with an attorney.