I don't have a problem with the Wiz being a woman in this update of the story. This isn't L. Frank Baum's "Oz." If this were a straightforward version of "The Wizard of Oz," I would say no. Why? Baum was specific in giving his female characters in this story all of the real strength and power. Dorothy (the "heroine"), and the four witches (two good, two bad) are the real catalysts the propel the story. Dorothy's friends are all missing something (brains, heart, courage), and the Wizard is a phony.
To cast the title role as a woman would go against his original vision of a female-dominated, American fairy tale. And in 1900, with Baum's mother-in-law Matilda Joselyn Gage being one of THE most prominent suffragettes in our country's history, I don't think it's an appropriate move.
But for "The Wiz," already an adaptation of the story, I'm not sure it matters as much (or that much). I may change my mind after I see it, but my initial reaction is "why not?"
"Jaws is the Citizen Kane of movies."
blocked: logan2, Diamonds3, Hamilton22