When asked if he thought taking on Doctor Strange was a risk, he responded by saying: "I don’t think it’s a risk because of Marvel. Marvel is a stable of bringing out ordinary comic characters and turning them into screen-like gods. It’s very different, it’s an Astral Plane. There’s a huge new element to this Marvel universe that’s going to be employed in building this story and this character. But you know, I’m really excited about it, about working with Scott [Derrickson] whose imagination is endless, and all the boys and girls at Marvel who know what they’re doing. I’ve got a few things to get under my belt first. I’ve got to do that little stage production of “Hamlet” in the summer and the Christmas special of “Sherlock,” which we start shooting in about three days’ time – Whoops! Yeah, that’s there."
The interviewer also brings up a time when Cumberbatch taught English to Tibetan Buddhist monks in India and Strange's training with The Ancient One, which leads to the question of whether or not the filming would bring him back to the Himalayas, which leads Cumberbatch to say: "Ahh … you’ll have to wait and see. I’m not going to be eked out on any spoilers or reveals now. It’s quite a way off but I’m very excited about that spiritual dimension, obviously. It’s something that’s been a huge part of my life."
He is also asked whether or not he read a lot of Doctor Strange comics grown up, and Cumberbatch answers honestly that he didn't, but that he's certainly reading them now. You can read the full interview over on The Wall Street Journal by going here.
With the movie set for release on November 4th, 2016, I'd expect filming to begin late this year. Things will probably remain quiet on the news-front for a bit regarding DOCTOR STRANGE with Captain America: Civil War going into production around April, but I'm expecting to hear more casting announcements within the next few months.