Possibly set in 1715, playing as a pirate assassin named Edward Kenway. This would make you the father of Haytham and Grandfather of Connor.

Assassin's Creed 4 - Black Flag

After rumours yesterday, Ubisoft have confirmed they are releasing Assassin's Creed 4: Black Flag, and released some box art for the upcoming game.

Ubisoft have announced they will release more details on Monday - March 4th 2013.

It will be available on Xbox, PS3 and PC.

AC IV Box art

Leaked images

Some leaked images can be found here: https://imgur.com/a/5DiT5