Rumour: Infinity Ward developing Ghost-based Call of Duty 4 prequel

According to a story on thisisxbox.com, Infinity Ward is developing a prequel based on Ghost from Modern Warfare 2.

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COD] I would love to get a World War 1 COD game made by Treyarch, acting as a spiritual successor/prequel to World At War. The style and grittiness of WaW would fit

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Discussion - Modern Warfare 3 Ghost is Likely The Prequel !