@TehMasterer2: Damn this is the first intelligent response on the topic I've seen in the time I've been asking this question. Good points.

@Packer1080: ... tf? What are you even talking about?

@at0m1x: ... No, we picked that up on launch night. Halo 5 has always had co-op.

Game Pass is the new Blockbuster.
It fills that void almost perfectly.

Pretty weird though, and doesn't explain anything.
Multiplayer networking 24 people together (Big Team Battle) clearly works.
The campaign itself is ready.

What is the actual problem?

@at0m1x: Co op is in 5.
I play it all the time with my wife.

Man. I was hoping to see an Xbox Design Labs sale.
Need me a new Series X controller, in Orange, with properly colored buttons.
(Why do they insist on removing all the color from buttons on all the controllers?)

@jenovaschilld: I assume that's why Microsoft doesn't allow just anyone to make wireless Xbox controllers.

@rolento25: Why y'all acting like the rhetorical nature of my statement wasn't crystal clear...

It has nothing to do with my phone and 100% you made a movie I couldn't care less about. Anything even remotely medieval or high fantasy puts me off.