
A product listing at UK supermarket chain Tesco was briefly up on their website. It showed the above title and box art.
Although this is far from an official announcement, there are a few things that point to the legitimacy of this image:
The next Call of Duty game is to be made by Infinity Ward, the current generation logo is more plausible and Tesco isn't known for listing non-existent stock and, as a major retailer, will likely have gotten notice of an important game like this to makes shelf space long in advance.

This game, if it turns out to be real, may mean a return of the fan favourite 'Ghost' character, who was last seen taking chargrilled a little too seriously.
[Rock, Paper, Shotgun]
[Tesco]