If you planned on playing Call of Duty: Modern Warfare Remastered while reselling, trading or giving away the Call of Duty: Infinite Warfare disc, then Activision may have you changing your plan. The Remaster of Modern Warfare requires the disc of the latest Call of Duty game in the drive to play.
Listed in the fine print on the Call of Duty website the new addition of the text can be seen in full below
At launch, Call of Duty: Modern Warfare® Remastered will contain only 10 MP maps from the original Call of Duty: Modern Warfare game. Additional MP maps will be made available by 12/31/2016. Modern Warfare Remastered is a full game download (game disc must be inserted to play Modern Warfare Remastered). Internet connection required. For more information, please visit www.callofduty.com/MWR_FAQ.
Call of Duty: Modern Warfare Remastered is a digital download which comes as part of the more expensive Legacy and Digital Deluxe editions of Call of Duty: Infinite Warfare. It does not come with the standard edition of the game.
Digital versions of Call of Duty: Infinite Warfare and Modern Warfare obviously forego this requirement as they can also not be re-sold.
PlayStation 4 owners buying the Digital Legacy Edition or Digital Deluxe Edition gain access to Call of Duty: Modern Warfare Remastered from the 5th October 2016. Call of Duty: Infinite Warfare releases for PC, PlayStation 4 and Xbox One on the 4th November 2016.