While I don’t want an entire Hyrule land (because… which version?), I think a big Zelda dark ride could be fantastic (supported by a shop and tavern).
I think Kirby’s World is aesthetically too similar to Mario and Pikmin is still too niche, though Kirby and Dedede meet n’ greets would be perfect. My choice for the next land would be Animal Crossing or a Smash-Bros. themed crossover town.
Super Nintendo Attractions I want to see:
Zelda dark ride
Luigi’s Mansion dark ride
The Roost coffee bar (Animal Crossing)
Dodo Airlines spinner (Animal Crossing)
Tom Nook’s River Tours (Animal Crossing flume where Nook tries to sell you real estate through the entire experience)
Peppy’s Stunt Flyer (Starfox)
Smash ride (chaotic indoor drop tower)
Metroid coaster
Rhythm Heaven karaoke cafe
F-Zero coaster
No Splatoon ride, but they can have a t-shirt shop.