The Teenage Mutant Ninja Turtles franchise has been a kid-friendly endeavor for many years now, but it's finally going to get an R-rated live-action treatment courtesy of Paramount Pictures and a former head of DC Films. Per The Hollywood Reporter, Paramount Pictures is in development on Teenage Mutant Ninja Turtles: The Last Ronin, which is a popular storyline that has been seen in IDW comics and is known for its violence and high body count. Tyler Burton Smith, who co-wrote the upcoming action film Boy Kills World, is penning the script and the intention is to make this a live-action feature that carries an R-rating.