I think the stage selection is pretty fantastic overall, but yeah, it's definitely not perfect.
I don't really care about Fountain of Dreams or Dream Land 64 returning, but yeah, Poké Floats would be nice. Mute City will be irrelevant, though, if we're getting Mute City SNES from the 3DS version (which I believe we are).
And yeah, having two Mario Circuits is kinda lame. There are so many more interesting tracks in Mario Kart 8 to pull from... almost any other track would have been better, even Mario Kart Stadium. Why not Mount Wario?! Gah...
We'll definitely get at least one returning Pokémon stage, but it'll be Pokémon Stadium or Pokémon Stadium 2, not Poké Floats.
The stages I mentioned were just some choice examples of stages that are generally popular among the community but weren't in Brawl.
I hope of the two Pokemon Stadiums they choose 1 over 2, 2 had too many gimmicks that get in the way of the actual fighting. Though, 1 does have the terrible collisions and terrain (hey maybe they could consider fixing those if they're updating some of the stages like Hyrule Temple and Norfair).
I forgot about the SNES Mute City... dunno why lol. I'd still prefer Melee's Mute City, though over Port Town. (BUT I'd understand it would create the same issue I have with Mario Circuit where it's literally a stage with the same name and general aesthetics going for it). I just can't comprehend the choice to have
two Mario Circuits and it didn't cross their minds to pick a different track from MK8 to base a stage on... I mean come on... :/
The best I can hope for with respect to Port Town is that they fix the major issues I have with it: the cars KOing
way too early and the giant ass wall you can
easily get hit into
and get tripped from. If they fix those issues, I'd have no issue playing on regular Port Town. Otherwise, SNES Mute City is a better stage than Port Town by far.