User blog comment:Damac1214/"THE GHOSTS ARE REAL" - Callofduty.com updated to create a "Call of Duty Mosaic"/@comment-4781227-20130430042536

COD: Ghosts.

The plural definitely suggests that there will be some sort of new faction, comrpising of a group of soldiers that resemble Simon "Ghost" Riley from MW2. They may have been inspired by his legacy, therefore contributing to a new cause.