I think we kinda/sorta attempted this before, but I'd actually love to see some stage selections/"rosters" from the regulars here.
So I'm going to take a shot at this since I didn't get a chance to before. I don't know what to expect so I'm going to do a mix of potentials and hopefuls. Here goes:
Mario Series:
Comet Observatory (Wii U)
Sprixy Kingdom - World Bowser (Wii U)
Acorn Woods (Wii U)
Rogueport or Bleck Castle (Wii U)
Super Mario 3D Land (3DS)
Dream World - M&L Dream Team (3DS)
Waluigi Pinball (3DS)
Pipe Maze SMB3 (Wii U & 3DS)
Zelda Series:
Skyloft (Wii U)
Ancient Cistern (Wii U)
Forbidden Fortress - Windwaker (Wii U)
Gerudo Valley (3DS)
Spirit Tracks (3DS)
Lowrule (3DS)
DK Series
Donkey Kong's Treehouse (Wii U & 3DS)
Golden Temple (Wii U & 3DS)
Yoshi
Touch Fuzzy, Get Dizzy (Wii U & 3DS)
Metroid
Pyrosphere (Wii U & 3DS)
Planet Phaaze (Wii U)
SR388 Caverns (3DS)
Pokemon
N's Castle or Plasma Frigate (3DS)
Pokemon Stadium 3 (Black/White/Black 2/White 2 Elite 4 Room Transformations) (Wii U)
Lumiose Tower (Wii U & 3DS)
Kirby
Another Dimension
Lor Starcutter
Dream Land - Patch Land Variant
Kid Icarus
Palutena's Temple (Wii U)
Medusa's Temple/Underworld (Wii U)
Wrath of The Reset Bomb (3DS)
Lightning Temple (3DS)
Fire Emblem
Tower of Guidance (Wii U)
Arena Pherox (3DS)
Star Fox (I am so fucking lost here lol)
Zoness Tanker (Wii U + 3DS)
Area 6 Satellite (Wii U + 3DS)
Earthbound
Saturn Valley or Mt. Itoi (Wii U + 3DS)
Tanetane Island (Wii U + 3DS)
F-Zero
...
Wario
Game & Wario (WarioWare Ver. 2) (Wii U & 3DS)
Captain Syrup's Ship (Wario Land: Shake It) (Wii U & 3DS)
Pikmin
Garden of Hope (Wii U & 3DS)
Punch-Out!!
Smash Association Ring (Wii U & 3DS)
Wii Series
Wii Fit Training Room (Wii U & 3DS)
Pilotwings Resort (Wii U & 3DS)
Game & Watch
Flat Zone 3 (Wii U & 3DS)
Animal Crossing
Smashville (Wii U & 3DS)
City Hall (Wii U & 3DS)
Sonic
Windy Hill Zone (Wii U & 3DS)
Megaman
Wily Castle (Wii U & 3DS)
Misc.
NintendoLand Train (Wii U)
NES Remix (Wii U)
Find Mii (3DS)
Swapnote (3DS)
Streetpass (3DS)
Dillon's Rolling Western (3DS)
Pushmo (3DS)
Murasame Castle (Wii U & 3DS, believe)
Radarscope
Any chance Nintendo will have DLC for this game?
I really and honestly hope they go wild and have a generation long campaign with it. Smash typically rolls out once every 5 years on average and isn't prone to re-releases. What's more, the platform fighting genre only has Smash currently, so it doesn't really get anywhere near the overexposure as traditional fighters. I am down for as much as they can come up with. New stages, music and trophies at a regular clip and maybe a handful of new characters rolled out twice or so a year to keep the hype and player base steady would certainly be a great way to monetize Smash without scaring people off.
Fire Emblem Awakening shows they aren't above expansions and extra campaigns/content and Mario Kart 7 shows that they are cool with balance patches and general exploit workarounds. With how they're treating Mario Kart 8 as well, one only has to wonder if the other of the big multiplayer games from Nintendo will get the same treatment.