Activision studio Infinity Ward will not work on a third installment for Modern Warfare as it pursues development of a completely new game, reports VG247. The game blog cited inside sources in saying that the studio that gave birth to Call of Duty and updated the franchise with Modern Warfare is moving on from the IP. Infinity Ward has said it has not planned out its next game as it continues to support Modern Warfare 2 by developing new downloadable content coming later this year. Activision has not commented on VG247 s report.  The site’s sources added that the next Activision studio in line to develop Call of Duty games could be Sledgehammer Games, which has placed recruitment ads for developers of triple-A caliber shooting games. VG247 also reported a separate rumor that began circulating this week that Treyarch, the Activision studio that had thus far focused on continuing the World War II based Call of Duty games, is working on a Vietnam War title in the series.  Read more at VG247.