Rooster
Chain Chomp
Animal Crossing and Splatoon cover the demographic spread far better than Ring Fit. When you have options that cater to a more varied audience, leading with a character most of the online fanbase is ambivalent towards isn't a great choice to actually appeal outside of Ring Fit's more casual-skewing, overall less online-attuned audience. Smash reveals aren't only for that kind of audience either.Smash character reveals are not only for men in their 30s who post on video game forums
Especially since a lot of the Ring Fit audience played it simply to work out, not due to attachment to the characters. I mean Ring Fit usually wasn't even promoted in Directs because it was such a different audience. It's largely not the same group who salivate every time a Smash reveal drops.
There's a reason Villager and Mega Man were in the initial trailer, and then Wii Fit Trainer was just unceremoniously dropped later that E3, after the presentation. You want to lead with a character that actually holds appeal to many different audiences. Including both the casual audience and the men in their 30s who post on video game forums.