User blog comment:Plasmaster/Smash 5's Stage Roster/@comment-12498802-20160421063154

Here are my thoughts, counting a couple of new stages

Mario and related franchises


 * 3DS Rainbow Road
 * Wii Mushroomy Kingdom
 * Wii U Super Mario Maker
 * GCN Jungle Japes
 * Some stage inspired by the arcade game Donkey Kong
 * Wii Yoshi's Island

Zelda


 * 3DS Gerudo Valley
 * 3DS Spirit Train
 * Maybe a stage in a temple in Hyrule?

Kirby


 * Some new stage based on Kirby and the Amazing Mirror
 * Some new stage based on Kirby Canvas Curse/Kirby's Power Paintbrush

EarthBound


 * 3DS Magicant

...and... I have no clue about anything about EarthBound.

Star Fox


 * GCN Corneria
 * Wii Lylat Cruise (I think that's what it's called?)

Pac-Man


 * 3DS Pac-Maze
 * Maybe a stage based on Pac-Man World

Metroid


 * GCN Brinstar (and maybe Brinstar Depths)
 * Wii U Pyrosphere
 * Something in obvious relation to Metroid Fusion

Pokemon


 * N64 Saffron City (maybe... not entirely sure)
 * 3DS Prism Tower

Sonic


 * Planet Wisp I swear (see this blog post for more details)

''And... that's it really (for now)''