No, it is definitely a fact. Cuphead on Switch is a fact. Minecraft on Switch is a fact. Ori on Switch is a fact. Banjo in Smash on Switch is a fact.
Also, this:
I don't understand why Minecraft keeps being brought up. They were never going keep it exclusive to Xbox no matter what from the moment the acquisition was announced so it has no bearing on what's going on right now and is probably why this statement was made to begin with.
And Cuphead is neither owned nor published by Microsoft.
My point is that there's most likely not a partnership and Nintendo just likes goes after these specific types of games and Microsoft is just cool with that.
MCC probably won't happen.
Any future first party Xbox game from the studios they've acquired probably won't happen.
Gamepass/Xcloud probably won't happen.
Rare Replay definitely won't happen for technical reasons so stop.
Smaller stuff like Ori 2 and Battletoads might depending if Nintendo's interested.
That's all there is to it.