Who should Batman fight in the new movie?

Now that Warner Bros. has officially announced plans for a new Batman movie, it's time to discuss who he should fight in the new film.

While The Joker will always be Batman's biggest enemy, it's not a possibility to bring him back unless they recast and that could be tricky. Two-Face was set up perfectly, but Christopher Nolan has assured fans that he really died at the end of "The Dark Knight," so that leaves him out.

Since these films are more realistic than the previous Batman series, that leaves out The Penguin, Mr. Freeze and Clayface.

There are two ways Nolan could choose to go, he could either use another of the well known villains like Catwoman or Red Hood; or he could use a lesser known character like Crime Doctor, Firebug or Necodemus.

My idea is that they introduce Ra's al Ghul's daughter Talia al Ghul. Since Bruce spent time being trained by Ra's in "Batman Begins," there is already a backstory built in that they could have been involved. Talia comes to town with her League of Assassins to kill Batman. She uses their past as a distraction to get close to Bruce and take away those that he loves targeting Alfred and Lucius.

This way the story is consistent with the previous films and there can be some awesome action scenes of Batman fighting the various members of the League of Assassins.

As far as casting, I'd like to see Zhang Ziyi from "Crouching Tiger, Hidden Dragon" as Talia.

Of course rumors are swirling that the villain could be Catwoman or The Riddler. Personally, I think Riddler is too cartoonish for the world that Nolan has established. Catwoman could work but a role like that really hinges on the casting.

I imagine somewhere Nolan and his brother and co-writer Jonathan Nolan are locked in a room arguing over all these issues.

Also if someone could tell Christian Bale to tone down the Batman voice in the next one that would be great.