User blog comment:Immortal ripper/Which villain/hero will be next to show up?/@comment-71.127.152.188-20140118040331

Black Mask (Ra's al Ghul is in the show's continuity, why not Black Mask?)

Brick (He's already on The List)

Cheshire (Why the heck not? She could be a League of Assassin's member.)

Copperhead (I'm sure Arkham fans would love it.)

Lady Shiva (She's a League of Assassins member.)

What do you guys think? Personally, I would love to see some of the lesser known villains get their chance to shine.