Personally I wouldn't mind this if it was limited to just games from the Final Fantasy series, especially given how long ago it's been since the Shantotto event was around. It'd make for another good way of honoring other elements of past games.

As for other series like Dragon Quest or Yo-Kai, I'd say no to just because it feels like it'd draw too much focus away from the Final Fantasy series, which is what I think the game should honor more.