The CW recently announced that they were looking into other DC Properties to make shows of after the success of Smallville and Arrow. First up is a Wonder Woman project called Amazon, but what other characters should be addressed
Dick GraysonNightwing, Detective Comics, Batman - Odds are as long as Batman continues to thrive in films we're not going to get a series bit that doesn't mean we can't take advantage of his supporting cast, like Nightwing.
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Barbara GordonBirds of Prey - Like Dick Grayson's Nightwing, she would be someone a series could be built around and given The CW's more female demographic a female superhero would work well
Justice Society Odds are we wouldn't get a Justice League TV series but the next best thing would be a JSA film, the episode that introduced them in Smallville was a fan favorite so the viewers would be there