Witcher 3 was announced for switch at E3.
"Translation: "[Breaking! Witcher 3 GOTY edition is coming to Switch in September.] According to a reliable source from distributor, Witcher 3 GOTY edition is coming to Switch in September. Chinese localization exclusive to Asia version."
checking Taobao.com (shopping site under Alibaba), multiple sellers have already listed the game. Some of them are big seller on taobao so I feel that this might be real. You can check it yourself, all the listings are still there. Just type "巫师3ns" into the search bar."