Absolutely didn't expect Seph, love it. Now it's time to reach and turn this into Rayman speculation.
You know why this reveal makes sense in retrospect? The lack of FF7 anything. Same songs as Smash 4 and Cloud was the only Spirit. We played it off as Square Enix being greedy which... yeah? they waited for DLC to add more content instead. But why does this matter? Cause I think the same logic could work with Rayman.
We bring it up a lot, but this adds fuel to the fire, Rayman going from three trophies to just Ray himself is a very strange choice when it probably takes virtually no effort to add spirits. Could mean nothing but by using the Sephiroth Spirit Board logic, Rayman could probably be in the same boat: planned for DLC later, so they avoided adding too much content from his game to have a meaty content pack that doesn't reuse much like Min Min did.
I acknowledge it's reaching, since like, Min Min's board reused a bunch of Arms spirits, but still, that's the fun of speculating.
P.S. really sorry for the Geno fans