Batgirl and Rogue
I watched the trailer for the extended cut of Batman v Superman: Dawn of Justice and there is a quick moment with Jena Malone, who was cut from the film. Some had speculated she was playing Barbara Gordon, but from her appearance, I'm not so sure about that. If there's no place for Barbara Gording in the films, perhaps Batgirl could show up on TV's Supergirl. That's a World's Finest team that might actually crack a smile once in a while!