Post all stage speculations here.
I would like to see:
Sector Z (Star Fox; Remake, a larger version of Corneria with meteors)
Donut Drops (Yoshi's Island, two rows of dropping donut platforms, a spinning platform, and tiny chunks of land on the sides)
Bowser's Castle (Super Mario Series, a large, black castle. Players fight on its roof, just like Peach's castle. Small Bullet Bills are fired around and Magikoopas cast spells at the players)
Aether-Temple Grounds (Metroid Prime Series, the large courtyard in front of the temple, with war wasp hives, the broken crate, and a portal to the dark world. Every once in a while, the players will be sucked into the Dark World, with a similar, but more rockey design that have Ing attack)
Post yours.