They COULD have added Sans... just saying. He wears a blue coat
And of course, they'd have to include
that infamous song that might play when you fight Sans, depending on whether you have the DLC or not.
I'm honestly surprised that Undertale hasn't gotten a spirit event yet. Even if it was limited to four spirits, you'd think they could group the characters up like they did with Octopath Traveler. (ex. Frisk and Flowey, Sans and Papyrus, Undyne and Alphys, Toriel and Asgore)
Kind of surprised that the Wonderful 101 didn't get a spirit event either, since you'd think it would be easy enough to add spirits for Wonder Pink, Wonder Green, and two of the others. (I'm assuming that they're limited to four new spirits per event, though I have no idea why - you'd think they could add five, six, or even eight spirits at once, given how much time they give you to get them)
While I'm talking about spirit events, hopefully we get a Final Fantasy 7 one, because it's bizarre that Cloud's the only one with a spirit. (a general Final Fantasy one would be better, but that might be spreading it too thin) Use renders of
Tifa,
Aerith,
Barret, and
Sephiroth from Final Fantasy 7 Remake (I'm guessing that wouldn't have whatever issues that are associated with Nomura's concept art), release Mii costumes of those characters in the next character pack (maybe based on the
blocky overworld
models from the
original Final
Fantasy 7?), and include one song each so we can actually expand on the Final Fantasy soundtrack. (it's not an ideal way to do it, since it's basically charging money for individual songs, but I'll take what I can get)