After some rumors, it has now been confirmed on Nintendo Direct. It will be released this year.
Incredible but right! This year you can enjoy the award-winning adventure in the open world #TheWitcher 3: Wild Hunt – Complete Edition for #NintendoSwitch, at home or anywhere. (I.e.# NintendoE3 pic.twitter.com/YBBUYcb7JI
– Nintendo Spain (@ Nintendo) June 11, 2019