Each answer will resolve to "Yes" if the specified content is officially added to Mario Kart World through updates or downloadable content (DLC) and playable by December 31, 2025.
For 'new tracks', these answers will include 'classic' or 'retro' tracks added to the game that are not already present in World. They do not need to be entirely new to the series.
Update 2025-06-28 (PST) (AI summary of creator comment): For the newly added answer regarding traditional three-lap Grand Prixs in online play:
This will resolve YES only if a dedicated mode or option is added.
It will not be sufficient if the 'Random' race selection is simply reverted, or if traditional races can only sometimes come up in the voting options.
@gallerdude I'm not sure exactly what you meant because there could be different forms of this, but I've added one for a dedicated mode/option in online. I'm assuming you didn't mean simply reverting the 'Random' change, and you can already sometimes get a traditional race to come up in the voting options.