I read the other day that in the new Batman cartoon, they wanted to use Kathy Kane as Batwoman, but DC didn't let them because the character turns out to be a villain on that episode. Dini or someone said DC doesn't like it when they use their heroes as villains in other media, especially if they have their own book... I wonder if the hispanic woman cop who betrays Gordon in The Dark Knight was originally supposed to be Montoya, but DC asked Nolan to change it. She did have her own book at the time, or at least plans to launch it.