https://www.gamespot.com/articles/dark-souls-remastered-on-nintendo-switch-delayed/1100-6458300/

Bandai Namco has announced the Nintendo Switch release of Dark Souls: Remastered has been delayed. The game was originally scheduled to launch alongside the PlayStation 4 and Xbox One versions on May 25, but it has now been pushed to summer 2018. The Solaire of Astora Amiibo has also been postponed into the same timeframe. The PS4 and Xbox One versions, meanwhile, are unaffected.

Dark Souls: Remastered was announced for Nintendo Switch during a Direct event held in January. The Switch version displays the game at 1080p resolution with 30 FPS when played in TV mode. Nintendo also clarified that the Dark Souls Remastered "includes the Artorias of the Abyss DLC, as well as improved framerate and resolution from the original."