Board Thread:Spoilers!/@comment-6175354-20140212194028/@comment-1826156-20140324014126

According to the books the Silver Shoes were lost when Dorothy left Oz since they couldn't exist outside of a magic land. (It's later stated when she obtains the Nome King's belt that it too would be lost if she took it out of Oz). So the shoes could be in anyone's hands if they go with that.