Doctor Strange's Main Villain Introduced In Captain America: Civil War?

We just now learned that Daniel Bruhl is going to be part of the growing ensemble of Anthony and Joe Russo's Captain America: Civil War, and already, there's an interesting wrinkle that might suggest the actor is in for a longer haul that expected. Buried at the bottom of its piece on Daniel Bruhl's casting, Variety notes that the unidentified villain Bruhl "is not the main villain in Captain America: Civil War but could potentially be the top menace in Marvel's Doctor Strange." Hold on, what? W...