Far Cry 4 is out right now. I have no idea why you are reading this and not instead staring at your special edition statue as it gathers dust. If the smell of new manual is not enough for you, why not ponder the future of the game? Ubisoft have released a trailer highlighting the benefits of picking up the game's Season Pass (now containing 73% more Yeti).
Most of the Season Pass offerings appear to be either solo or versus:
Continue your Far Cry® 4 adventure with the Far Cry® 4 Season Pass. Unlock all upcoming Far Cry® 4 add-on content, including the Escape from Durgesh Prison campaign, the Valley of the Yetis campaign, the five pre-order missions plus weapons, and Overrun – an exclusive PvP mode. Includes an exclusive single player mission only available with the Season Pass.
The game itself will allow you to launch co-op missions online on certain missions; make sure you check back with Co-Optimus soon as we will have a co-op-centric review of the game ready for your delectation.