Update: The fine print at the end of the Modern Warfare Remastered trailer says PlayStation 4 users who pre-purchase the required version of Infinite Warfare will get the Modern Warfare Remastered campaign on October 5, 2016. Which is 30 days before Infinite Warfare’s November 4 release date.
Following the debut of Call of Duty Infinite Warfare campaign gameplay, a new trailer for the Modern Warfare remaster was shown. The end of the trailer revealed that PlayStation 4 will get the campaign exclusively for 30 days. The announcement was very subtle and how it will work was not explained.
Analog Addiction will have more information when we get it.