Assassin’s Creed: Rogue is the other big Assassin’s Creed game releasing this year. It’s set in the same time period as Assassin’s Creed III and Assassin’s Creed IV: Black Flag, features a similar emphasis on naval transversal as well as the Templars’ story, and is set in the same locations, using the same assets and everything.
If you were curious to know more about the game, this list of Achievements for it (for the Xbox 360 version, although the PlayStation 3 Trophies will probably be completely identical) will probably sate your curiosity at least somewhat. It appears, based on this list, for example, that there are only six sequences in this game, as opposed to the standard 12 playable ones that we have gotten used to.
Apart from that, the Achievements also seem to hint at the presence of some sorts of cheats in the game, since some of them are for completing certain objectives only with certain cheats active.
Assassin’s Creed: Rogue launches in November on Xbox 360 and PlayStation 3.