I would personally like something similar to Bowser fury, in which it's a seamless open world game. Also would be a nice showcase of everything really.
- Ray tracing
- Non existent load time
- 4K capability
- Textures
Like with the success of Botw i would presume Nintendo would want a genre defining game that will set a new standard to be a launch title
Like having a lot of games at launch doesn't mean an automatic success, most of the time it takes one game to make people realise that this system is the real deal, like compare the Wii U launch line up vs the Switch launch line up.