"The Batman," aka "The Show That Is Not 'Batman the Animated Series,'" aka "Batmanime," will be adding Harley Quinn to its roster of re-designed villains. The good news is that the episode is written by Harley's co-creator, Paul Dini; the bad news is that he doesn't know if Arleen Sorkin will be doing her voice.
The thing about "The Batman" or, really, any animated Batman show is that because the '90s series was so good, and because it became so much a part of the way my generation thought about Batman, it's almost made the character less adaptable for television. There was no problem doing a Batman series with a different style and approach than the old Filmation version, but after "Batman: the Animated Series" it just seems like Kevin Conroy is the voice of Batman/Bruce Wayne as much as Daws Butler is the voice of Huckleberry Hound. It's not surprising that Warner Brothers would want to make a new Batman series in the style that kids expect now (fake anime; lots of jumping and kicking); but it somehow seems almost sacrilegious. Some comic-book characters can be adapted and re-adapted for television every so often; Batman may be a prisoner of WB's mid-'90s success.
On the other hand, "The Batman" seems to be a relatively successful series, and it won an Emmy, so what do I know?