The December 2018 crossover between Arrow, Flash and Supergirl will focus on Gotham City (it’s not clear which universe, but I’d guess Supergirl’s), feature Superman and the Flash together, and introduce both Batwoman and Lois Lane.
Now we have a villain: Jeremy Davies will be playing Dr. John Deegan of Arkham Asylum, who “might just be crazier than the inmates he treats.”
He sounds like a new character.
But I wonder if he’s an adaptation of Doctor Destiny, aka John Dee?
Good casting in either case!
When I heard “John Deegan,” first thing I thought was Dr. Destiny, too. Mr. Freeze is supposed to play a big role in this one, but a Dr. Destiny-type imagined reality, fantasy scenario, characters trapped in personal hells, etc., is an easy, somewhat typical way to structure a TV crossover — indeed, there was aspects of that in both Invasion and Earth X. So it sure seems feasible.
John Dee does sound like a possibility, and if so I’m really interested to see how they portray him in live action! Sounds like this crossover may be heavy on the psychological horror.