If you are interested in the story of Batman : Arkham Origins, I recommend you skip the pass and go straight to buying Cold Cold Heart. If you are a completionist, enjoy multiplayer or like having as many skins as possible, then it is worth the money. The Season pass does not cover the Black Mask Challenge Pack or the Online Supply Drops 1 and 2.

You can't help feeling that more DLC was planned but they didn't generate enough revenue from the sales, or couldn't be bothered to keep going. From my region view of the store, the pass costs $20 for $25 worth of content unlike season passes for other games which give you more bang for your buck. You might be better off waiting for a GOTY edition or just buying the DLC you want.