It's been rumoured for a while, but Entertainment Weekly confirms that animated movie Batman: The Killing Joke will indeed be R-Rated when it hits DVD and Blu-ray later this year. That makes it only the second DC Comics adaptation to receive this rating (the first was the home video release of Batman v Superman: Dawn of Justice), and with Kevin Conroy and Mark Hamill set to voice Batman and The Joker respectively, there's a lot for fans to look forward to when this take on the classic comic hits stores.Sam Register, president of Warner Bros. Animation & Warner Digital Series tells the site.They mention that there are no plans in place for a PG-13 version, so this is one cartoon you won't share with your kids!Batman: The Killing Joke premieres at the San Diego Comic-Con in July, so stay tuned for updates!