SCEA boss Jack Tretton made the announcement during the platform holder's E3 press conference, according to PlayStation Lifestyle.
The DLC wasn't detailed, but Tretton said the Assassin's Creed 3 content would be available when the game launches in late October. Far Cry 3 is set for release in early September.
An Assassin's Creed 3 PS3 hardware bundle was also confirmed.
CVG has published a Far Cry 3 hands-on with the E3 demo, along with a selection of new screenshots.
We've also got the very first info on Assassin's Creed 3's multiplayer component. The big news is a new 4 vs. 4 mode called Domination, which is loosely based on the classic King of the Hill gameplay.