Far Cry 4 will be supported by a DLC Season Pass priced $30 according to a listing found on the website of US retailer GameStop.
The Season Pass is listed for Xbox One, PS4, Xbox 360, PS3 but not PC.
Unfortunately the product listing includes no information on what content is included in the Season Pass. Expect more details to come both at E3 and in the months that follow.
Far Cry 4 is scheduled for release on November 21.