According to a story on thisisxbox.com, Infinity Ward is developing a prequel based on Ghost from Modern Warfare 2.
The game will apparently lead up to the events of Call of Duty 4: Modern Warfare, showing how Ghost became a main part of Task Force 141 in MW2, as told in the series of David Lapham comics on Ghost put out around the time of MW2's release.
These events will revisit COD4 and MW2, but this time from Ghost's perspective.
Obviously, this could be absolutely untrue in every sense. We'll ask Activision.
VG247 was told by US development sources last January that, before ex-heads Jason West and Vince Zampella were fired from the studio for insubordination, that Infinity Ward was not creating Modern Warfare 3.
Activision COO Thomas Tippl confirmed in a financial call last May that Infinity Ward was still working on something in the Call of Duty universe, although what that is unknown.
The future of the COD IP has also been determined outside of Infinity Ward: Treyarch will release the first map pack for Black Ops, First Strike, on February 1.
Upstart Sledgehammer Games, led by ex-Visceral bosses Glen Schofield and Michael Condery, is also working on a title in the series.
It's thought that game is set in space, although nothing has been officially announced yet by Activision.