Call of Duty 7 could be set in Vietnam if the latest rumours are to be believed.
Call of Duty: Vietnam (as it's unofficially being called for now) will focus on the story and individual characters, in the same way the Modern Warfare games have.
It will also look to Vietnam films such as Platoon, Apocalypse Now and Full Metal Jacket for inspiration. Which is a given, really, given the nature of the games and the setting.
But what we can't say is how accurate this information is. There's been a lot of murmur about a Vietnam Call of Duty but nothing official, so that's all it is for now - idle speculation. If we get any solid info on the next Call of Duty outing, we'll let you know.