If you still own and play on the Xbox 360, you will be unhappy to know that there will be no Season Pass for that version of Call of Duty: Black Ops 3.
The official Xbox Store listing for Call of Duty: Black Ops 3 shows all of the things you can get for the game. It notes in the disclaimer that “Season Pass and ‘The Giant’ Zombies bonus map are not available on Xbox 360“.
It’s unknown at this stage if this means DLC of any kind will not be available for the Xbox 360 version of the game too. After all, this version of the game is already missing the single player campaign that is present in the PC, PS4 and Xbox One versions. Another thing worth mentioning is that the last-gen version runs at only 30fps and not 60fps.
As for the Season Pass, it will be similar to past Call of Duty games. There will be 4 DLC map packs released over the coming months. Treyarch and Activision are promising these maps will come in 2016 and include some fan-favorites from past COD games like World at War and the older Black Ops titles.
Anyway, hopefully Activision confirms with everyone if the Xbox 360 (or PS3) version will be getting any type of DLC as there is no Season Pass.