If this is happening..I have to wonder if they're going to be open of XBOX coming to Switch, but be extremely vague until E3 for a grand reveal of the Game Pass/xCloud.
I also have to wonder, if Microsoft is already at development on a accessory that allows XBOX controller's to be playable on Switch.
It would open the door for compatibility, particularly with other games on Nintendo Switch that have been on the XBO.
...also..one thing to point out: Game Pass has initated since last year, that all Microsoft First Parties would be coming for those on Game Pass, for free.
That would mean Crackdown 3, Sea of Thieves, ForzaH, PUBG, and more would be potentially available for Nintendo Switch through xCloud, depending on how they play out. And that's not even mentioning other potential future games, like Battletoads, ForzaM, and more.