I was just talking about this with a co-worker who's a massive fan of Diablo.
He was saying it didn't really interest him, until I pointed out what you just said.
It's going to be a shitshow if we'll see that scenario play out.
Also, just imagine Sony and Nintendo rejecting GP.
That is pretty much guaranteed. Sony is in a partnership with Ubisoft for Ubisoft+ Classics, and PS still doesn't have Ubisoft Premium. Game Pass is never coming to PlayStation, at least not in this form.
And I have very little hopes of XGS games selling well on PlayStation either. Most of them are just not good enough to compete with PlayStation's games on an even playing field.
Consumers have only so much money. Will they spend it on Wolverine, Death Stranding, Venom, Ghost of Tsushima 2, Helldivers 2, Stellar Blade or Halo Infinite, Gears of War, Forza, Redfall, Starfield, Hi-Fi Rush, or Sea of Thieves!
For the same reason, I also expect lots of these games to become available on PS Plus relatively soon.