After 10 Main Mario Party games, we had Mario Party: The Top 100 which allowed us to replay 100 minigames. I think the Mario Kart franchise once it's had 10 main games should have a game featuring the Top 100 tracks, even those used for the 2nd time (of course the only chance a Retro Track could be used more then once in the Mario Kart franchise is as DLC and if they ran out of tracks from a Specific Game, which they'll soon do with MK64 come MK9). With Nintendo now having one system to focus on, the Switch's successor if you ask me should be able to have both a MK10 and a Non-Main Mario Kart game with the Top 100 Tracks.