Upgrade to Legacy Edition and Grab Modern Warfare Remastered
For a limited time if you bought Call of Duty: Infinite Warfare Standard Edition, Activision is adding in the option to allow players to upgrade from the Standard Edition to the Legacy Edition, which grants immediate access to Modern Warfare Remastered for $29.99.
This upgrade offer is available on PlayStation 4 and Xbox One. For PS4, the upgrade is available to those who own the digital or retail standard edition of Infinite Warfare. For Xbox One, the upgrade is available for those who own the digital version of standard edition of Infinite Warfare.
This offer expires in March 2017 so now is a good time if you want grab yourself Modern Warfare Remastered especially after they just released a major update including a lot of new items.
Source: Activision Support