Could mean nothing, but it does feel like we have a pattern.
One week after the Inklings were first officially shown off in Smash, Splatoon got a remix.
The same day Ridley was revealed, Metroid got a remix.
The same day Simon and Richter were revealed, Castlevania got a remix.
One week after K. Rool was revealed, Donkey Kong got a remix.
Two weeks after Chrom was revealed, Fire Emblem got a remix.
Excluding franchises that aren't already represented on the roster, we still have:
Obviously most of these franchises won't be receiving a newcomer, so we could see a new track from
or
any day now. Others might be held off purposely to tie in with someone new.
Ultimate has been breaking patterns left and right, so I could easily see this going down in flames. Still, I find it odd that popular franchises like Mario, Pokemon, Sonic, and AC are on this list. Perhaps a hint towards Geno/Paper Mario, a Gen 7 rep, Shadow, and Isabelle?