All of them songs would work for smash and i am hoping for at least 1 xenoblade song if the series doesn't have a character. I wonder what they'll do for the kid icarus level in this game. maybe the underworld?
As for stages i hope in terms of the numbers we get and what i hope they are
! So brawl had 41 arenas, 10 of which were retruning levels so i'm going to assume it's around the same. Maybe like 45
Smash Series: Battlefield, Final destination (2)
Mario Series: Starship Mario, Airship, NSMB level, Paper Mario level (4)
Donkey Kong Series: DKCR level, classic DK level (2)
Yoshi Series: Yoshi's Island level (1)
Wario series: Wario Ware level (1)
Zelda series: Skyloft, Spirit Train (2)
Kirby Series: Dream Land level, Epic yarn level (2)
Metroid series: Bottle ship (1)
Star Fox series: Thorntail Hollow (1)
Fire Emblem series: Tower of guidance or an Awakening level (1)
Pokemon series: Pokemon Stadium 3, Pokemon League (B/W) or X & Y level (2)
Mother series: Saturn Valley (1)
Animal Crossing Series: City Folk level (1)
F-Zero series: Green Planet (1)
Kid Icarus Series: Underworld (1)
Ice Climber series: Original level (1)
Console series: WuHu Island (1)
G & W series: G&W 3 (1)
Gyromite series: Gyromite level (1)
Pikmin series: Pikmin 3 level (1)
! This 28 Levels so far. Each New series would get 1 level each then so sol sanctum for golden sun or murasame castle for takamaru.
then i hope for 12 returning stages. while they'll all probably be from brawl i would like if they varied it and took 4 from each. My picks would be:
Smash 64: Hyrule Castle, Planet Zebes, Sector Z,, Saffron City
Melee: Mushroom Kingdom 1, Yoshi's Story, Kongo Jungle, Fountain of Dreams
Brawl: Castle Seige, New Pork City, Port Town Aero drvie, Skyworld
! so that makes 40 levels so far and then the rest all depends what new franchises are in so for punch-out! you could do a boxing ring or for advance wars you could have a level where you fight on tanks and is constantly moving