If we're rereminiscing on Brawl era speculation, here's a little interesting analysis: how many characters from Sakurai's old poll from the Brawl era made it into Ultimate?
*McFox EDIT* I'm Sticking this topic, because tons of people are still looking for it, and it could provide some useful information. it could mean any number of things, but i think it's worth noting that these are the poll entries/suggestions from japanese fans that Sakurai has presented to the...
smashboards.com
King Dedede(5) -CONFIRMED
Diddy Kong(4) - CONFIRMED
Geno(4) – Mii outfit
Ike(4) - CONFIRMED
Ridley(4) - CONFIRMED
Captain Olimar & Pikmin(3) - CONFIRMED
Krystal(3) – Assist Trophy
Takamaru(3) – Assist Trophy
Windwaker Link(3) - CONFIRMED
Animal Crossing MC(2) - CONFIRMED
Claus(2) – Spirit
DeMille(2) - Spirit
Isaac(2) – Assist Trophy
Jeff(2) – Assist Trophy
Kawasima(2) – Assist Trophy
King K.Rool(2) - CONFIRMED
Lip(2) – Mii outfit
Lucas(2) -CONFIRMED
Mega Man(2) - CONFIRMED
Oguma(2)
Ouendan(2) - Spirit
Sukapon(2) – Assist Trophy
Stats:
About 10 characters on this list made it to playable status:
About six characters on this list (Krystal, Takamaru, Isaac, Jeff, Kawashima, and Sukapon) made it to assist trophy status.
About two characters (Geno and Lip) made it to Mii outfit status.
About three characters (Ouendan, DeMille, and Claus) made it to spirit status.
So the only character on this poll that's currently not in Smash in any shape or form is this..."Oguma" fellow.
I looked into it, and apparently it's supposed to be this random FE supporting character...?