Digimon Story Cyber Sleuth: Complete Edition was announced back in July 2019, but it is now listed on the Nintendo Switch eShop. You can also preorder through different retailers and through the Bandai Namco page.
Habumon confirmed on twitter that the DLC will be available in the base game for the complete edition and that some of the billboards were changed due to contractual reasons. Otherwise, it is a direct port from the Playstation 4 and Vita versions. Digimon Story Cyber Sleuth: Complete Edition will be available on Nintendo Switch and PC on October 18, 2019.