MWII not working (PC gamepass)

What if i wasnt a previous subscriber for pc gamepass but i was for xbox gamepass and ultimate could the pc gamepass trial still work?

The way it is supposed to work is that, to install Warzone, it needs to install a version of MWII (given WZ is a game mode of MWII):

"For Non-Modern Warfare owners: A version of Modern Warfare that provides access to only the Warzone portion can be downloaded separately from Modern Warfare as a free-to-play experience on the PlayStation Store, Xbox Games Store, or the Battle.net App (PC)."

https://www.callofduty.com/uk/en/warzone/strategyguide/welcome-to-the-warzone/WarzoneFAQ

It does stipulate in the Xbox store that Warzone includes MWII:

Keep in mind they have to be in the same region as you if they are in the newly expanded pc xbox gamepass regions it wont work since only gamepass pc will work there and they have to be in the Windows insiders program

Some of the games on PC are availble on gamepass on Xbox however not all of them such as Age of empires as it requires a mouse and keyboard. Also gamepass for PC is a separate subscription to Gampeass, you would either have to buy another gamepass subscription
or get Gamepass Ultimate which works both on PC and Xbox

Which gamepass are you talking about

Gamepass for PC OR gamepass standard

If you are using gamepass for pc for access to Minecraft on pc and using the same account on console To share then no

As gamepass for pc wont work on console

You need gamepass standard or ultimate for console

If you want to share a subscription for both pc and console you need ultimate which includes bothpc and console titles

Another solution since pc doesn't need a subscription other then realms

Is buy Minecraft on pc and keep realms on your profile and buy gamepass standard for minecraft access on console or buy core and Minecraft