Assassin's Creed IV: Black Flag hasn't come out yet, but that's not stopping the gang from Mega64 to guess what Assassin's Creed V will be all about. And Assassin's Creed VI. And even Assassin's Creed VII.
via destructoid http://www.destructoid.com/mega64-s-vision-of-assassin-s-creed-v-vi-and-vii-252744.phtml