I think the stages in Super Smash Bros. 4 need to shake up the tradition a bit. In the past, it's been one or two stages max for a series per SSB game, asides from Mario, and never originating from the same game. For example, for Zelda, there was MM and (presumably) Zelda II stages in Melee, and TP and WW stages in Brawl.
Sakurai has gone out to say that "a change of direction may be what's needed" and it's unlikely for the number of characters and stages to be increased from what we have. I perfectly understand taking that route in regards to characters, but for stages? There's always room for more of those. Even as DLC, I don't care, but there's no reason to limit stages just for the sake of it.
I'm personally not fond of the Skyloft stage idea. I'm actually rather sick of it, to be honest... The Sealed Grounds and Levias sound more appealing to me. I'd love a Lanayru Desert one most of all. Timeshift Stone smacking =D