Call of Duty 7 (working title) was leaked as being in production when James Clarke, a senior animator at Treyarch, stated on a website "I am currently on my second title as a senior animator in the games industry with Activision / Treyarch on Call of Duty 7."Activision confirmed in November 2009 that a new, yet-to-be-named Call of Duty game will be released sometime in 2010. The game will shift away from the World War 2 setting and cover the Vietnam War. The game is scheduled for a November 2010 release
taken from: http://en.wikipedia.org/wiki/Call_of_Duty_(series))
IMO this sounds like it could be a great game, i've been waiting for the COD series to make a vietnam based game for years now and finally its coming. but the bad part about it is that its in development by Treyarch (piece of shit company that shit out WaW). I personally hate Treyarch with a burning passion but since i waited so damn long for this kind of game, its a must get for me. hopefully more information on this game will surface soon
