Well,rite now i know that the characters are in it
Mario
Peach
Yoshi
Browser
Ice Climbers
DK
Fox
Link
Kirby
Pikachu
Samus
Zelda
NEW COMERS
Pit
Wario
Ike
Zero Suit Samus-Samus final smash
Pokemon trainer
Meta Knight
Diddy Kong
Snake
Lucas

But who do you think will be introduced to the game?