Their last (2022, pre-acquisition) annual reports literally spell that out.
> For example, in 2022, revenues associated with our three franchises—Call of Duty, Warcraft, and Candy Crush
—collectively accounted for approximately 79% of our net revenues—and a significantly higher percentage of our operating income. We expect that a relatively limited number of popular franchises will continue to produce a disproportionately high percentage of our revenues and profits. - https://investor.activision.com/annual-reports
Activision had three or four studios dedicated to Call of Duty leapfrogging each other to release one every year. (https://en.wikipedia.org/wiki/Call_of_Duty)
Their last (2022, pre-acquisition) annual reports literally spell that out.
> For example, in 2022, revenues associated with our three franchises—Call of Duty, Warcraft, and Candy Crush —collectively accounted for approximately 79% of our net revenues—and a significantly higher percentage of our operating income. We expect that a relatively limited number of popular franchises will continue to produce a disproportionately high percentage of our revenues and profits. - https://investor.activision.com/annual-reports