Ubisoft announced earlier today that a new Assassin's Creed game with a brand new hero and time period will be coming sometime in 2014's fiscal year. This could be anytime between April 1, 2013 to March 31, 2014.
President of Ubisoft Yves Guillemot promised that a major change will occur for the Assassin's Creed franchise and assured that the development would be taken on by a new development team.
This could mean that Assassin's Creed may see its first release on next gen councils sooner then we think. By the look of things new information about this new installment to the franchise will surface soon, with a mass amount of details at E3. Once new information is let out of the box we will be sure to update you.