Assassin's Creed IV: Black Flag has some DLC, well, it did. It's called Freedom Cry and its now turned into a standalone title but will be excluding the Xbox 360 and Xbox One. That's PS3 and PS4. We've got a video of it below.
Ubisoft has announced that: "Assassin's Creed Freedom Cry, (will be) available February 18th as a stand-alone title on PlayStation 4 and PlayStation 3 ... and February 25th on PC."
"Originally released as an add-on for Assassin's Creed IV Black Flag, Adewale's epic adventure is now available as its own stand-alone title; purchase of Assassin's Creed IV Black Flag is not required."