If this was ever released for Switch, would it even need a snapshot mode in special melee? Maybe it should be replaced with 5-7 player melee or "Master Hands Melee" or even an online local 4 player mode.

But certanly we should be allowed to choose from PAL, Japanese, and North American version gameplay styles, & multiple region languages in the former language option menu.
Perhaps Mario & Yoshi or Samus Unmasked can replace random default trophies when making a new save data.

It's also worth noting that Capcom, Konami, and other 3rd party trophies may not appear due to license issues.
Such as Rareware trophies, obscure N64DiskDrive games, and even indie obscure characters from old NES SNES and Gameboy games.