Neutral:
Battlefield - Standard 3 platform stage that is found in each SSB.
Yoshi's Island - There isn't really a way to camp unless it is under the giant platform. Still, I don't think that's likely
Lylat Cruise - If all the changes in this stage don't affect game play, and there are no lasers shooting at you, then this stage will probably be nuetral
Smashville - A flat stage with a single platform and no added effects except on Saturday Night.
Pokemon Stadium - Was neutral last time, but if the stage changes cause too much imbalance, it may have to be set as counterpickable.
Fire Emblem Castle - If the catapults and flaming arrows can actually hit you, then this will be bumped down to counterpickable.
Counterpickable:
Delfino Plaza - Much like Mute City. it has a few walk off and die spots too, but since those are temporary, you can't effectively camp at the sides.
Heilbird - If all the neutral stages listed are indeed neutral, I would leave this one as counterpick because of the possible walk-off at the start. This could be a neutral if extra are needed
Inside Castle - It might not be banned if we're lucky, but there are walk-off KO zones here, and unlike the stages above, they remain there the entire match.
Banned:
Bridge of Eldin - Losts of hazards going on, KOing from above seems to be the most effective if you're standing in the middle, but at the edges, you can walk-off KO.
Rumble Falls - Though this could end up being counterpickable, if the problems become too similar to IC's stage, it will be banned.
Skyworld - Holy crap, this place will create some complicated matches, and I believe it will give multi-jumpers a big advantage. Also, that platform at the bottom could be camped on, even though Toadstool jumping might be able to prevent that.
Mario Kart - I don't see an exciting battle spawning on this stage. I has walk-offs and the racetrack seems like a brawling place similar to underneath Hyrule Temple.