No, there really isn't. There are hundreds of characters that exist, sure; however, that is a far cry from deserving. I respect your opinion. That being said, I am almost 100% certain Nintendo agrees with me.
The requests would be valid, but again, there would be an arbiter and there are still plenty of licensing issues to consider. There is a reason most DLC characters were returning or third-party. If you do not believe history is about to repeat itself, so be it. All I can say is that most Nintendo newcomers are going to be from new games. Inkings, Spring Man, Rex, maybe even a "surprise" Labo character. Other than that, they will likely clean up. Ridley, Donkey Kong, another Mario, Pokemon Fire Emblem. We are not going deeper into Nintendo's IPs because there is no deeper. We are already scrapping the bottom.