I don't see any other way that Sony can compete. If the rumours are true about a Sony ganepass alternative then maybe they can put have them on both platforms. COD sells way more on playstation and that alone hurts Sony massively. I'm a little concerned that we're heading towards a monopoly that isn't good for the consumer and creates a we can do what we want mentality.MS want Game Pass on Sony and Nintendo hardware. In the end they will buy as many third party studios as it takes to reach that goal. In my opinion, Sony will probably relent soon if they can reach a fair financial agreement.
It's going to be interesting over the next few years.