Assuming the acquisition of Activision Blizzard proceeded, Microsoft has pledged to keep Call of Duty available on PlayStation for many more years.
According to a report from The Verge, Microsoft gaming chief Phil Spencer promised to guarantee Call of Duty on PlayStation with feature and content parity for at least several more years beyond the current Sony agreement.
Spencer has already made several public remarks with the same general effect, highlighting the importance of the PlayStation community to Call of Duty and comparing it to Minecraft, which Microsoft has maintained since its acquisition of Mojang in 2014. But this is the first such statement to guarantee the availability of Call of Duty on PlayStation beyond the terms of existing agreements, however vaguely.
Microsoft is keen not to portray its acquisition of Activision Blizzard as anti-competitive, since it is subjected to intense scrutiny from governments across the world. This is one leak Spencer and his team will have been quite happy to confirm.
Spencer announced for the first time that Call of Duty games will be available on Xbox subscription service, Game Pass, despite the fact that they are unlikely to be available on competing systems like PlayStation Plus. It's possible that this could still be a significant advantage for Microsoft as it seeks to broaden the notion of game platforms beyond the hardware used to play games at home.