UPDATE # 4.0 The roster now shows transformations, and the other potential newcomers, and Starfy is replaced with Shulk.
My roster prediction/wishlist, 50 slots, 55 characters:
EXPLANATIONS (IM REALLY BAD AT EXPLAINING
NEW! Shulk: very likely/popular.
Toon Zelda/ Tetra: Very important/popular LoZ character.
Toad: In a LOT of the Mario games, lots of potential, and very popular. (and I like him better then Bowser Jr.)
King K. Rool: VERY popular, check out the polls, most popular DK rep, villain, who
doesn't have him in their roster? Pretty self explanatory.
Ridley: See King K. Rool except he's a Metroid rep. Pretty self explanatory.
Palutena: Who else for Kid Icarus? Very Popular, female. Pretty self explanatory.
Takamaru: One of the most potential/likely retro characters, pretty self explanatory.
Little Mac: Pretty self explanatory Very popular.
Isaac: Pretty self explanatory. Very popular
Mewtwo: 6th Gen rep, VERY VERY popular, even before Newtwo, Pretty self explanatory.
Chrom: Pretty self explanatory. Very popular.
Pac-Man: Most potential 3rd Party.
RULES
1. No cuts
2.50 slots
OTHER POTENTIAL NEWCOMERS
Instead of Toad: Bowser Jr. Paper Mario
Toon Zelda/Tetra: Tingle
Chrom: Roy.
TRANSFORMATIONS
Zelda and Sheik, Samus and ZSS, PKMN Trainer, Squirtle, Charizard, and Ivysaur, Toon Zelda and Tetra.
Thanks to anyone who's artwork I may have used for the icons or anyone who made the icons.