Though the second Assassin's Creed title for 2014 still hasn't been revealed, Ubisoft has been kind enough to announce Assassin's Creed: Unity for PlayStation 4, Xbox One, and PC. Currently, all we officially know is the title will be set in France during the French Revolution. Now we're hearing reports that Assassin's Creed: Unity will feature a four-player co-operative mode with an actual narrative.
Former NeoGAF poster Shinobi602 tweeted that Ubisoft is preparing two demos for E3 2014, one featuring Assassin's Creed: Unity's single-player mode and another with the co-op mode. The Escapist confirmed that report with its own Ubisoft sources. This lines up with previous rumors by the Examiner, who said that Unity would skip the competitive multiplayer mode found in every AC title since Brotherhood, in favor of a cooperative multiplayer experience.
Assuming two different demos, it's entirely possible that Ubisoft will show one behind closed doors and one in public at E3. The other possibility is that Ubisoft shows one at its press conference and another at either Microsoft or Sony's event. Ubisoft and Sony have been partners for a while now, so that seems to be likely choice. Assassin's Creed has had PlayStation-specific content for a few games now and there was a Watch Dogs PlayStation 4 bundle before the game was delayed.
We still have yet to hear more about the rumored Assassin's Creed: Comet for Xbox 360 and PlayStation 3, meaning there's no word on where that game is set, who stars in the title, or even when it's coming out.