I think they gave us a clue to who else he was. He is also the Wizard of OZ. Thus why he was being called the wizard. He will use science in OZ to fool everyone into beleiving he is a wizard.
Ooh, that’s a good theory. I hadn’t thought of that! Although, I kind of want the Mystery Man/Neal Cassady to be the Wizard of Oz, but that does make a lot of sense.