Small hope that they give some love to some of their generally dust collecting franchises. Like Earthbound, F-Zero, or Custom Robo. (Franchises that would be outright dead if it wasn’t for Smash keeping them feebly alive.)
Mostly Custom Robo, I really love that franchise, and wish it got more then just Smash references via an Assist Trophy and one Mii costume.
Beyond that, I’d like to see the next Smash character reveal, and maybe also Mario Kart 9?