I lately have had this idea buzzing around in my head about the next game.
I think most people can agree that the roster will predominantly be big Switch successes. It's why you see Noah and/or Mio, Officer Howard, and Ring Fit on every roster nowadays. But does that just apply to first parties? With the way Nintendo has handled third party games and promotions, it would not shock me if they decide to highlight some third party games that were specifically switch successes. For this, I am talking pics more like Travis Touchdown, an Octopath Traveler character, or the Nahobino. Games that while third party, did receive a bit of a push from Nintendo. It also helps that most of these characters would be in theory easy to license, considering they are actively collaborating with these companies.
I know this is not something everyone would like to think about as likely. Personally, I would prefer it not be the case. As much this situation could in theory benefit a few characters I would like in such as Crash or Phoenix Wright, it is a lot less exciting than celebrating fan favorites or gaming history. Sure, I would not mind Travis, but picks like the Nahobino or Rabbids would just not excite me. But given how Nintendo has handled the Switch era, I think it is a realistic possibility that we do see this kind of attitude taken into the next game's roster.