So far nothing revealed. When they are ready to make their move they will announce it and not before that.
They have announced in the past, things for windows in PC and that there would be compatibility on Xbox, but nothing after that.
duduspace11 "Well, since we are estimating costs, Pokemon Red/Blue did cost Nintendo about $50m to make back in 1996"
Mr Puggsly: "Hehe, I said good profit. You said big profit. Frankly, not losing money is what I meant by good. Don't get hung up on semantics"
Azzanation: "PS5 wouldn't sold out at launch without scalpers."