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 – A new challenge for experienced players. The Adventure Pack adds additional floors to the Faraway Forest Cave, two new bosses; Blackhart and Zeta, and new quests that will be unlocked after completing the game’s story. Evan and his friends will find new costumes and additional rewards to acquire in the Adventure Pack, which will be free to all
Ni no Kuni II: REVENANT KINGDOM players.

(Season Pass) DLC #2 – Available this winter, this DLC will feature a brand new enigmatic dungeon for players to explore. Evan and friends will plumb the depths of this cryptic dungeon facing increasingly stronger enemies while trying to reach its deepest levels. The journey will be difficult, but the reward will surely be worth it!

(Season Pass) DLC #3 – Expected to release early 2019, an additional story expansion of Ni no Kuni II: REVENANT KINGDOM will be available full of exciting content. More details to be announced soon.

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).