Some spoilers for Batman: Arkham Knight below.
The Entertainment Software Rating Board has released a rating summary for the upcoming game Batman: Arkham Knight, and it gives some insight into exactly why the normally T-rated series has made the jump to M.
Several of the items in the description are present in older Batman: Arkham games, including takedowns “highlighted by brief slow-motion effects and loud impact sounds,” and even signs reading “live nude girls.” The profanity also seems to be in line with the previous games — don’t look for Batman to start dropping F-bombs.
However, it appears things are going to get a little more gruesome. Two particular scenes seem to take things to a violence level more in line with the Christopher Nolan movies (which, of course, still managed to get a PG-13 rating). The summary mentions a section where “a vehicle’s wheels are used to torture an enemy,” as well as a scene where someone is tortured on an operating table.
What’s also curious is that the rating summary says that players “primarily” play as Batman. Could this be a hint that there are other playable characters, perhaps even the titular Arkham Knight? It wouldn’t be out of the question after Arkham Origins included Joker gameplay.