If you could make up any Mario Kart game, what would it be?

You may submit a full concept of your game, and I will share mine once we get 10 concepts.

It would be a multi cup with all of the N64, GCN, and Wii tracks, plus custom characters for the cup.

It would be a multicup with 64 characters, with even the forgotten characters, customisable karts with hats and different colors, 96 tracks, plus 4 for the final cup, a battle mode with all of the modes ever appeared in the mario kart series with 50 arenas, a mission mode like MKDS, free roam like mario kart world, versus mode with item customisation, a badge creator, an achievement system with the ability to unlock characters, an online mode with all of CTGP modes and a track creator.

It would be a game with every Mario Kart track, racer, and battle arena ever made, (a Mario Kart Ultimate, if you will,) but Mario Kart Retro Rewind mostly already does this.

My Concept For A Mario Kart I Would Create Would Be A Mario Kart Where It Has A Bunch Of Tracks That HAVEN'T Gotten Remade After Mario Kart World (And This Doesn't Include Tracks That Were Only Remade In Super Circuit, 8 Deluxe's BCP And Tour So It's Just Tracks That NEVER Came Back)
(Also I Didn't Added Any Mario Kart World Tracks If Anyone Is Wondering)

And These Would Be My Five Cups I Would Make For Something Like This With Tracks That Never Came Back:
Mushroom Cup:
Wii Luigi Circuit
Wii U Toad Harbor
SNES Koopa Beach 1
3DS Wuhu Loop
Flower Cup:
DS Figure 8 Circuit
Wii Mario Circuit
Wii U Shy Guy Falls
Tour Piranha Plant Pipeline
Lightning Cup:
SNES Mario Circuit 4
Wii U Cloudtop Cruise
GCN Mushroom City
3DS Maka Wuhu
Star Cup:
Wii U Electrodrome
GBA Broken Pier
SNES Bowser Castle 2 (Don't Ask Why :V)
GCN Bowser's Castle (Yes.. Two Bowser's Castles In A Row Because I Didn't Knew What To Put Without Repeating Two Tracks From The Same Game In A Cup)
Special Cup:
Wii U Dragon Driftway
GCN Wario Colosseum
Wii Bowser's Castle
DS Rainbow Road

Mario Kart Arcade GP Collection. It's basically all MKAGP games ported over to the Switch with a free upgrade on Switch 2