Honestly, the more I look at it, the more I find this stage list plausible.
The stages for playable series make sense for a lot of them. Metroid will never get rid of it's Super Metroid legacy, DK Tropical Freeze seems to be forgotten, to the benefit of Country Returns, Starfox is still cursed with the Great Fox (
).
Although weird that Mario only have 3 stages, the 6 playables Mario characters (minus Dr Mario) have a homestage (well, not really for Peach)
The Rhythm Heaven, NintendoLand, NES Remix stages make sense (remember that there's a Nazo no Murasame Jo medley on 3DS, only for Smash Run).
I'd even say that Kid Icarus having 3 stages make sense too.
The only really weird thing is the fact that there's Town & City AND Smashville.