I hate the internet, you guys. I thought the "Mads Mikkelsen will be the villain in Doctor Strange" thing was all but confirmed, but unfortunately the source that probably most matters - Mads himself - has cast doubts upon that. Says he:
"I know as much as the rest of the world. So far it's been rumors, so I'm waiting on a phone call... It would be fantastic to be a part of the Marvel family. I mean, it's something we all grew up with. We all have our heroes, and Doctor Strange is definitely one of the more interesting things."
I suppose we have to believe him - I don't think the cast and crew of Doctor Strange are going to stage an epic Candid Camera episode, shooting the film around him without him realizing. I like picturing that, though! Picture it: Mads is walking down the street when Tilda Swinton just walks up to him in Old Chinese Man make-up and just starts screaming about Infinity Stones. I so want this to happen! You know Tilda would totally be up for it, too.