Benedict Cumberbatch has officially joined Marvel Studio’s “Doctor Strange,” the company said Thursday. The actor will play neurosurgeon Doctor Stephen Strange who, after a horrific car accident, discovers the hidden world of magic and alternate dimensions and becomes the next Sorcerer Supreme and primary protector of Earth against magical and mystical threats. Marvel Comics vets Stan Lee and Steve Ditko co-created the character in 1963. Cumberbatch’s casting had been in the works since Octobe