In fact, Sledgehammer Games spent around 8 months working on a Vietnam War era shooter title, and unlike other games in the franchise, the title was going to be completely third person.
Glen Schofield revealed to Game Informer that they were getting quite involved with the project before it got cancelled. "We were really getting into the story," Schofield said. "We had a big moment that I would love to get into a game someday, but it's not something we could do in first-person."
After around 8 months, only 15 minutes of gameplay was actually playable, at which point Activision asked if they'd like to help with Modern Warfare 3 instead. The title was then scrapped, and Sledgehammer Games went in-house to work on Modern Warfare 3, and the rest is history.
Sledgehammer Games are currently working on Advanced Warfare, a new Call of Duty title planned for release later this year. Whilst Modern Warfare 3 was a joint effort between Sledgehammer Games and another development team, Advanced Warfare will be the first solo title created by Sledgehammer under the Call of Duty moniker.
From what we've seen so far, the gameplay looks quite fresh, and it really takes things to another level when it comes to future weapons and equipment.
Call of Duty Advanced Warfare will be released on November 4th for Xbox One, Xbox 360, Playstation 3, PS4 and PC.