There's a new Bat in Gotham City. Like Bruce Wayne, she's a rich socialite by day and a black-clad vigilante at night. And, also like Bruce Wayne, in both incarnations she's apt to sweep the ladies off their feet. Kate Kane, the new, revamped Batwoman, isn't the first lesbian character to debut in the DC Comics universe, but she might have the highest profile. Last June, DC Executive Director...