My the way: i want to be pack 2 the end of sakurai. They should use it to let new team members under him create the characters. I know, a team is developing them, but the initial creation is usually sakurai area.
I want him to let that do others. People that in the long run take over.
And then, start developing new game ideas. I really would like him to release really small games for a year (2-6 months of development) for 5-10$, to refreshen his view on games, and then create a interesting new ip. Maybe a serious one? hes always pumping smash full with this world ending stuff (FD/Battlefield look like old ruins, Killing all of, fihgt of literal light an dark manifested as Lovecraftian beings)