Halo wars 2 DLC

I was wondering why do I have to pay for the new dlc even tho I have the season pass for halo wars 2? It’s really -Yoink-.

Hey OP, there is a long running thread here that can be used for discussion:
https://www.halowaypoint.com/en-us/forums/38bd6e2ebbb14e5b9b359bb029588800/topics/atn-not-in-season-pass/6e782f8e-1343-4f43-87ac-013851eb2e7b/posts

Short story is that Awakening the Nightmare is not included in the Season Pass