Or maybe, not a big maybe here, which many won't like... MS sells so few Xbox consoles, it no longer makes financial sense and the Xbox console goes away altogether. And the fewer people on Xbox consoles (as they are leaving in droves) means fewer GamePass subscribers, which makes GamePass bleed money and ultimately shut down.
That seems to be the likely situation. But, if you want to believe PlayStation gamers are going to find a Microsoft published series they like and switch to Xbox to play it, even though everything is already on and will contine to be on PlayStation, go ahead and believe that.