Might be a hot take but even if Nintendo releases N64, GCN, and Wii games in a legally playable state, I'd still recommend instead just modding the original games using game-altering codes.
They give such a breath of fresh air to these games; even if you disregard the crazier codes out there, some codes are really QoL changes that can seem small but really do make older games more enjoyable.
For instance Mario Party 4-7 have codes that increase speeds of each turn, skip the intros, alter the minigames you play, enable widescreen display. They also enable plenty of granular options that Nintendo wouldn't ever put in their games such as turning off the music, changing the coins blue and red spaces give/deduct or even reverse the behavior, enabling handicaps for certain players, change star prices, change minigame rewards, and so on. Some may be cheats but others are just options to toy around but really do increase the replay value of these games so much more.