In an interview with Crave Online, Batman writer Scott Snyder gives more insight in that we won't be seeing fan favorite characters like Cassandra Cain or Stephanie Brown any-time soon.
Source: Crave Online
Though the interview is of the upcoming Joker themed event, "Death of the Family", the interviewer couldn't help but notice when talking to Mr. Snyder that certain characters were excluded from the event:
CRAVE ONLINE: Are Batwing and Catwoman in the same boat?
SNYDER: To be totally honest, I'm not really sure with Batwing at this point. If Batwing did tie in, I'm sure it would be fun. Catwoman, I can safely say that we're talking about it right now. It really is a thing that affects the core Bat-characters who exist in the New 52 right now - meaning Damian, Barbara, Tim, Dick, Jason - as they stand right now in terms of who's been re-introduced in the New 52. Those characters are the ones who Joker really has a problem with in a very particular way.
CRAVE ONLINE: Fair enough - although this also begs the obligatory question of whether or not there is a chance Cassandra Cain or Stephanie Brown will show up in this?
SNYDER: (laughs) That's the obligatory question I was trying to answer in a sidewinding way.
CRAVE ONLINE: I thought so, but I thought I'd try to clarify that anyway.
SNYDER: What I would clarify is that I promise you, as soon as Cassandra Cain and Stephanie Brown are characters that are okay to reintroduce, that have stories that Warner Bros. and DC want to use, I'll be the first person to write them. I loved writing Cassandra Cain in Gates of Gotham, and Stephanie Brown in Bryan Miller's Batgirl was one of my absolute favorite series. I adore them as much as you do, but those decisions are just above my pay grade. I don't know what else to tell you.
CRAVE ONLINE: In that case, how big an influence is Warner Bros. on your creative direction, then?
SNYDER: Nothing. They've been great about totally not getting involved and giving us total creative latitude with Batman. They've never asked us to use things for the movie. DC has been wonderfully generous, too. I'm waiting for the other shoe to drop, but nobody has said 'you can't do these horrible, bloody, terrible things to Bruce or the Bat-family or anything.' So I just keep going! (laughs)
So there you have it. It appears the descion isn't from the top Warner Brothers brass that are denying the use of the characters, but someone who is higher than Mr. Snyder and has enough power to deny any use of the characters. But that isn't going to stop this reporter or any of their fanbases to continue and mess with DC until they are returned to prominence.
Written or Contributed by: Zechs