It’s, once again, “the fundamental transformation of the United States of America.” I am going to state, emphatically, that there is but one Wizard of Oz movie; and that is the original! You cannot improve on a classic. You just caint!
Of course that “one true” movie is based on a series of books, and honestly kind of butchers the story. You might not be able to improve upon a classic, but you can still work with the story in the books and not even really try to do anything with the original movie.