Speaking to Eurogamer, Assassin’s Creed IV: Black Flag game director Ashraf Ismail admitted that an overarching narrative for the series exists and that Ubisoft know how the series will ultimately end.
“We have an idea of where the end is, what the end is. But of course Yves [Guillemot, Ubisoft’s overall boss] announced we are a yearly title, we ship one game a year. So depending on the setting, depending on what fans want, we’ve given ourselves room to fit more in this arc. But there is an end.”
When the franchise will end is another question, particularly with Ismail’s assertion that “there’s a lot more stuff in our game that is hinting at other possibilities.”