Assassin's Creed would be Assassin's Creed 4: Black Flag, with a new protagonist. Some speculated that it would be a pirate-themed game.
Now, a new screenshot has popped up that is allegedly from the game, showing a black-clad assassin strolling on a dock.
If that weren't enough, Kotaku has leaked anof what is allegedly promotional material for the game, and is even more explicitly pirate-oriented.
Sources also say that today an Ubisoft meeting is being held to show off the new game - so stay tuned and check this space for Assassin's Creed news.