It's unclear what exactly it is referring to with regards to Price. Is this a tease for the next Modern Warfare, or some Ghosts DLC? Sledgehammer is now the third COD studio.
Activision has switched Call of Duty from a two-year dev cycle to a three-year, as Sledgehammer is added to the rota with previous experience co-developing Modern Warfare 3.
Perhaps he'll just make a cameo appearance as a multiplayer skin? Maybe, if the... price is right. Nail'd it.