I'm gonna go through a list of new stages for the sake of it from each series I have on my prediction roster. No new retro stages for past franchises who just get older stages
Mario: New Donk City, Bean Bean Kingdom, World Bowser
Zelda: Vah Medoh, Clock Town
Pokemon: Aether Foundation, Poke Floats 2
Kirby: Resolution Road, Castle Dedede
Metroid: SR388, Skytown
Star Fox: Area 3 (Zero)
Donkey Kong: Homecoming Hijinx, Gangplank Galleon
Yoshi: Paper craft Town
F-Zero: Fire Fields
Earthbound: Saturn Valley
Fire Emblem: Dragon Shrine (another generic stage)
WarioWare: Diamond City
Pikmin: Pikmin Park
Kid Icarus: Underworld
Animal Crossing: Campsite
Wii Fit: Balance Dojo (features from many mini games)
Punch Out: Training Warehouse (has a comicbook look)
Xenoblade: Leftherian Archipelagolo
Splatoon: Inkopolis
ARMS: Spring Arena
Style Savvy: Catwalk
Rhythm Heaven: Remix Fever (features various Rhythm games)
Excitebike: Excitebike Arena
Sonic: Eggman Empire
Mega Man: Central Highway
Pac-Man: Championship Maze
Street Fighter: Maharaja's Palace
Bayonetta: Noatun
Rayman: Glade of Dreamd