Activision has recruited Sledgehammer Games to help Call of Duty: Modern Warfare 3 meet its November release date, according to the LA Times. Last March the heads of Infinity Ward, Vince Zampella and Jason West, were fired, taking many of IW's talent with them. They started a new company, Respawn Entertainment, leaving what was left of Infinity Ward to develop the annual Call of Duty in time for November. Sources close to the situation say Activision has asked Sledgehammer Games to help finish Call of Duty: Modern Warfare 3.
Sledgehammer Games is made up of former Visceral Games members, the team behind Dead Space. Shortly after their formation Activision announced they would be working on a "Call of Duty game that will extend the franchise into the action-adventure genre." This game was slated for 2011. However it seems that this project has been put aside now that Sledgehammer is taking on half the weight of developing CoD: Modern Warfare 3's single player. Raven Software has been recruited to work on the multiplayer.
In the past Infinity Ward was the only developer behind Modern Warfare games. This is the first time Activision has sought help to reach their deadline. Call of Duty games are unofficially released every year. If the next Call of Duty game was delayed or seemed rushed it could be detrimental to Activision Blizzard's reputation and wallet.
Call of Duty: Modern Warfare 3 has not officially been announced.
Source: LA Times