Peach's castle, is probably near 100 percent likely. The ledges can be grabbed now, which according to Smashpedia, is one of the player bases main problems with it. All that's left is the bumper, and honestly, I can't see that being a problem to the extent it would ban it. Maybe a counterpick in the extreme conservative regions, but I doubt it.
Though East Coast will still probably ban it, the pricks.
Hyrule is a more problematic stage, though I'd still play it. It's a bit large, and, I think the tornadoes are random, though correct me if I'm wrong, it's been a while. While I think there are some camping concerns, I think the more liberal stage areas will have it as counterpick, while conservatives will ban it.