Maybe it's gonna be

Call of Duty 6: Psychic Warfare. Imagine, you won't need guns nemore... Just use ur psychic abilities to toss rocks and all that crap. Your perks are like Psychic power, dead psychic, psykill (overkill) , 3x rocks, and ur knife would instead be a supersonic blast.

Rubbish aside, I think CoD6 would be either set in the Cold War or the Iraq war.