A promise from Microsoft? That's like a promise from the homeless guy twerking and foaming at the mouth on the street corner.
It seems more like a timer for when they will definitely stop supporting call of duty on psx
It probably only applies for as long as CoD is marketed on any platform. Couldn't a spin-off-of-a-spin-off be made and CoD shut down within that timeframe? E.g. CoD: Modern Warfare, Modern Warfare: Xyz, and finally just Xyz 2028.