Maybe. He was a big favorite during Brawl, Smash 4 and Ultimate and Square was involved in two of those, so we have to keep expectations in check.
Mario RPG doing numbers should definitely increase his odds, but he still has Waluigi and Toad to contend with on the Mario side of things and characters like Lara Croft, Crono, Tifa, and so many more on the Square end. Not to mention every other “fan favorite” that has persisted since Brawl. Just look at Isaac who did amazing on the ballot and got a re-release before Ultimate and was only rewarded with an assist and a Mii costume. Mario RPG’s success could result in a playable Geno, but it could just as easily result in a few music tracks, or an updated Mii costume, or nothing. Ya never know.
This. Geno fans are a persistent bunch, but I still wouldn’t call him the next objective fan pick.
That said, if this isn’t already a tired out topic, who does everyone feel are the next big “fan picks?” Ultimate went pretty hard with the long requested crowd pleasers (Ridley, K. Rool, Banjo). I wanna say Isaac, Waluigi, Bandana Dee and Geno are probably the next big ones to throw in. Maybe Krystal and Skull Kid, but I’m not sure how vocal those fan bases are nowadays.