I'm pretty sure Nintendo won't have any interest in exploring AR in a console again. They already tried it briefly with the 3DS, with some of the inbuilt software and Pokémon dream radar, the denpa men and then later Pokémon go and pikmin bloom, but it's just not the kind of thing that makes for immersive yet easy to understand new gameplay experiences which Nintendo is all about. Building a specific piece of hardware around the idea would be a bad idea, I'd be tempted to say Wii U level catastrophic mistake.
AR is good for editing in to fantasy scenes in movies to give a futuristic look how advanced our tech is vibe, but in real life it hits the same roadblock that it's way more of a pain in the arse than just putting things on a TV or handheld screen and there's no way around it being impractical for general use, and not having many actual applications to videogames outside of a very small, very limited number of genres