Now that is PURE bullshit. Why should we reserve space for DLC we might or might not purchase in the future. We can make space available in the future if we decide to buy them. I really HATE companies like this who are so freaking smug they will require a purchase to reserve space for future additions.
Interesting, already 175 GB's: "Activision explains why Call of Duty: Modern Warfare needs 175GB of storage :
https://www.pcgamer.com/modern-warfare-system-requirements/
"Update: Activision has updated the Modern Warfare system requirements post to explain why it's asking for 175GB of real estate on your hard drive. "175GB is the storage space we recommend players keep available in order to download the post-launch content we’ll be bringing to Modern Warfare. At launch, the initial download will be smaller," the page now says.
Unfortunately, there's no indication as to exactly how much smaller that initial download will be, as the minimum and recommended specs still call for 175GB of drive space."