According to Brad Smith, Vice Chair and President at Microsoft, the contract has been signed:
We’ve now signed a binding 10-year contract to bring Xbox games to Nintendo’s gamers. This is just part of our commitment to bring Xbox games and Activision titles like Call of Duty to more players on more platforms. pic.twitter.com/JmO0hzw1BO
— Brad Smith (@BradSmi) February 21, 2023