Later in 2013 we will get a new Superman movie and there is still talk (and talk is cheaper in Hollywood than it is is on the Internet) of a Justice League movie. I am even hearing rumors of a Doctor Strange movie.
Now no one is talking about it. Except maybe for me. But I would love it.
The plot would need to be introducing Zee to the world. Maybe she is already known as a gifted stage magician following in her father's tragic footsteps. So this would be a younger Zee, not world weary yet. She could still know Constantine. This would be somewhere between "Young Justice" and "Justice League Dark". Maybe even before the Paul Dini run of Zatanna.
Who should play her? Well. You want some young, but not a teen. Someone that has acting chops and also has a good grasp of what makes Zee so interesting. She is the most up-beat of the DC supers despite her tragedies. She deals with evil, scary shit all the time, but still tries to do her show in Vegas. It's an interesting mix really, and one I think would translate well on the screen.
I am no casting director, but I think Michelle Trachtenberg is a great choice.
Lest you still think of her as "Dawn" from Buffy or Harriet the Spy, I do want to point out that as of this writing she is 26. She can act. Plus I think she looks the part.
She can do the hat (best one I could find of her in a hat)
And the fishnets:
And she has done voice work in the DC world before.
Though a live action movie might be a stretch considering how we can't even get Wonder Woman on the big screen.
We know Bruce Timm loves pretty much everyone that ever played in Buffy or Angel, so if we can't get a live action movie then an animated one would be great. Plus that would mean a better chance of Paul Dinin writing it.
Well we can all dream right?