User blog comment:Crazy sam10/My views on a MW4/@comment-3967954-20130219104259/@comment-3967954-20130219195246

The Cold War hasn't been done much. There haven't been many good Vietnam games and I certianly haven't heard of any Korean War games. There were plenty of interesting conflicts in the 20th century that seem to have been ignored.

And, although not really CoD's territory, there are plenty of pre-1900 events that haven't been covered.

As for WWI, it could work. It wasn't just trench warfare (although the majority of it was). I'm not saying they should, though, because the gear and settings would be duller than dull.