We haven't been given many details about this game's season pass, yet, through the PlayStation Blog there has been an explicit confirmation of the existence of a season pass for Assassin's Creed III, through a pre-order listing for the Gold Edition of the game, done over the PlayStation Network.
If any gamer wants to purchase this game, it will cost $59.99, while the Gold Edition, including the Season Pass, will be $89.99. Said Season Pass is expected to give gamers access to much of the announced "extensive" DLC for this game.
It was asked by users if said Season Pass will be offered separately over the blog, and was given a positive answer by a representative, whom simply stated "Yup, it will"
Assassin's Creed III is going to be released this upcoming October 31 for Xbox 360 and PS3, while the PC version will be released on November 23. Wii U version will launch on November 18.