Ni no Kuni II: Revenant Kingdom
There looks to be at least three separate DLC packs announced for Ni no Kuni II: Revenant Kingdom. Two of which look like they will be part of the game's season pass while the first one will be free to everyone.
Adventure Pack DLC #1(Season Pass) DLC #2(Season Pass) DLC #3

Ni no Kuni II: Revenant Kingdom is already out for the PlayStation 4 and for PC via Steam. The Season Pass is now also available via the PlayStation Store and Steam and is priced at $19.99 (USD).