It's not exactly the "Summer 2018" that was promised. Presumably, it took longer than expected to adapt the intensely difficult game to the Switch's controls. The PS4, PC and Xbox remastered version all launched as scheduled on May 25th.
The Switch version of the game will have 1080p resolution when docked in TV mode and 720p when playing the handheld version. The frame rate is 30fps, and it will support 1–6 players in online mode. DLC will be included in the remaster.