'The Killing Joke', which features dark and considerably more "adult" content is often cited as one of the best Dark Knight stories ever written. Photo: Warner Brothers/DC

The Dark Knight gets darker as more comic book movies risk R-rating

Warner Brothers says it is at a point where it can choose to be 'authentic to the source material'

Topic |   CNBC

TOP PICKS

'The Killing Joke', which features dark and considerably more "adult" content is often cited as one of the best Dark Knight stories ever written. Photo: Warner Brothers/DC
READ FULL ARTICLE