Awhile back, Deadline had confirmed that Sam Raimi would be the director for the Wizard of OZ prequel.
Speaking with Collider on the red carpet of the Saturn Awards, Raimi was quoted saying, "I’m not really committed to ‘Oz’. We’re gonna wait and see how that all goes. I did read it, I love the script, it’s a great project. It’s something I’d like to become involved with."
Well, there's still a chance he will direct.