Speaking with investors, Ubisoft CEO Yves Guillemot said that the next game will release during the company's fiscal year 2014, which ends April 2014.
The new game will feature a new protagonist and it will be set in a new time period, though specifics as to who and when were not revealed.
It is also being developed by a different team to Assassin's Creed 3.
"It is the benefit of multiple teams working on multiple chapters of the product, each getting several years to make their versions of an Assassin's Creed game," Guillemot said.
He added that the game will be "another major leap forward for the franchise".
No platforms have been mentioned for the next Assassin's Creed game at this time.
Assassin's Creed 3 was released last year, taking place over a 30-year period in colonial America, beginning in 1777.
It launched alongside PlayStation Vita spinoff Assassin's Creed 3: Liberation, taking place in Louisiana during the French and Indian War.
> Read Digital Spy's review of 'Assassin's Creed 3'
> Read Digital Spy's review of 'Assassin's Creed 3: Liberation'
Watch a trailer for Assassin's Creed 3 below: