Here is my predictions for where certain characters will end up in Smash Bros 4. I think only 45 will make it on the roster.
<confirmed characters>
we all know that these guys are in.
Mario
Donkey Kong
Link
Samus
Fox
Kirby
Pikachu
Pit
Bowser
Megaman
Villager
Wii Fit Trainer
Olimar
<probable characters>
If any of these guys don't make it on the roster I would be really surprised.
Luigi
Ness
Captain Falcon
Jigglypuff
Yoshi
Peach
Zelda/Sheik
Marth
Ganondorf
Diddy Kong
Wario
Meta Knight
King Dedede
Ice Climbers
<"maybe" characters>
These guys' chances are probably 40%-60% chance of making it.
Ike
Pokémon Trainer
Sonic
Snake
Lucas
Falco
Wolf
Mr. Game & Watch
R. O. B.
Mewtwo
Roy
Ridley
Bowser Jr.
Chrom
Little Mac
Isaac
King K. Rool
Palutena
Ghirahim
Demise
<Previous characters I think/hope will not make it>
besides Lucario, I didn't think any of these were necessary
Lucario
Toon Link
Dr. Mario
Pichu
Zero Suit Samus
Young Link
<Characters I wish will make it but have little to no chance of doing so>
Anthony Higgs
Groose
Birdo
Funky Kong
All my opinion. Not based on anything I read on this site or other similar sites.