I know we haven't got much on it however, its inevitable that we shall soon find out who is playing the Sorcerer Supreme and we already have a Director on board.
The hot gossip trending is that we shall find out soon enough who is playing Stephen, one name is Benedict Cumberbatch. I would like to see Mads Mikkelsen, he was interested in The Dark World (Malekith) and even had talks but commitment to Hannibal changed it.