Deadpool the 4th wall breaking comic book character by Marvel had a movie this year & nailed it for being a funny rated R movie. Yet, I suspect that the upcoming direct to video release coming up by DC Comics titled Batman: Killing the Joker isn’t rated R for just colorful language. Considering the word killing is in the the title it man have some graphic depiction or the darkest version of Batman we’ve seen since the Christian Bale movies.
Source: Batman: The Killing Joke animated movie rated R — exclusive | EW.com