Cave Story + could be coming to PS4/Xbox
It has been discovered that Cave Story + for Nintendo Switch actually contains button prompts for PS4, Xbox One and Wii U controllers.
The game, which is an enhanced port of the PC indie classic, is only announced for Switch at this moment. These button prompts does suggest that Cave Story + will come to other platforms at some point though I doubt it will come to Wii U at this point.
Perhaps Nicalis is still working on the other versions or they cancelled them but forgot to remove the game’s data from the Switch version. Hopefully we will find out soon.