Okay, my prediction is that eventually they will bring all games to PlayStation and Switch - unless there is a technical limitation like Switch can't play a certain game - or a human resource issue (like Moon Studios is not available anymore to create an Ori port) - or an unviability issue like Redfall is not even worth porting because no one will buy it.
While I have played your game, know that folks who said Xbox will need PS and Switch for Bethesda games were right. Hi-Fi Rush being ported is proof of that. They don't need any more validation.
The word eventually is a difficult one.
I'd say initially at least Microsoft is going to focus on games that are NOT cornerstones for Xbox.
Despite the fact that it would probably make sense. I don't think we'll see Halo Infinite anytime soon. I don't even think we'll see Halo MCC.
Microsoft doesn't have a relationship with Moon Studios, but Ori releasing on PS4 and PS5 is beneficial for both companies. I think it could happen.
I think where the lines get blurry is games like Starfield, simply because of the time and cost involved, that will hit PS5 sooner rather than later.
So I think you'll see a staggered approach somewhat similar to Sony and their approach on PC where SOME games are Day 1 and some games will take a year+, some games will takes years, and some games will never come.
Blade is definitely going to be a PS game and likely on day 1.
Forza is an interesting one because it bombed so hard on Xbox that Turn10 may be desperate for additional revenue, but it's more in that integral Xbox franchise lane. There's also the reality that it probably wouldn't sell that well on PlayStation.
So I think you have to look at it from this standpoint
- Xbox to Xbox One back catalog titles
- Xbox Series Games from Microsoft proper
- Xbox Series Games from Microsoft extended i.e. Zenimax, ABK, and 2nd party titles
The games least likely to hit PS5 would be Series games from Microsoft proper and probably the top back catalog games.