Makes sense. The books are public domain while MGM owns the 1939 movie and Universal own the musical. Disney owns Oz the Great and Powerful, so I imagine they can pull heavily from there.
The green skin is a loophole because they are using a different color green
The same will probably be the same with the red slippers, or they could use the silver ones like in the book.
Yay for flying monkeys!
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"He was a lot of things to me" "The only conclusion was love"