User blog comment:Argorrath/Sledgehammer Games claims to be working on a new MW game/@comment-1187559-20130722034715/@comment-3171236-20130722041535

That would seem unlikely, considering the trilogy's title is "Modern Warfare" which implies the series is set in Modern times.

I said it below and I will also say it here: one possible idea they could pursue is a prequel involving Price and MacMillan in the mid 1990s, doing various operations around the world as part of the SAS. The mission layout would be somewhat similar to Black Ops Declassified, having no main antagonist and missions that are not connected as part of a story, except that the game would focus on how Price and MacMillan get along, and how one mission takes a few levels to complete.