I am sure they know a lot of community still play's Call of Duty World at War and 4: Modern Warfare. Now, back in World at War days, treyarch released a Game Editor program. Which allows you to take your ideas and create them for the entire community to enjoy. Call of Duty had lost a good amount of players (PC Gamers) since Modern Warfare 2, because Infinity Ward didn't have dedicated servers nor did they have Mods. Call of Duty would get so many more players if they had released mod tools for PC even console perhaps, all I am saying is that, I know, Call of Duty will most likely gain a huge number of players with a release of mod tools for Call of Duty: Black Ops 2. Treyarch team if you read this, consider, though I would probably assume that Activison would get your faces about it but consider.
Thanks.