The Call of Duty: Black Ops 3 Season Pass is $50 and it includes four downloadable packs of new content that will come to users after the release.
One of the perks to playing on PS4 is that PlayStation owners get access to the new Black Ops 3 DLC 30 days before Xbox users.
Until this release Xbox users got first crack at the new content, so this is a major switch. We don't know what will be in each of the packs, but PS4 owners will get first crack.