Some resetera users are posting screenshots from the beta. It looks like the game uses a Gacha mechanic to unlock characters, here you can see that Luigi is a rare character.

Each character has a special ability, based on the map. For instance Toadette being used on 3DS toad circuit gives her 3 item slots in the race, but 1 in other maps. Luigi gets the 3-item bonus on the Luigi’s mansion map.

200cc is in the game.

Will update as more information becomes available.

Here is some gameplay footage

Confirmed courses:

• SNES Chocolate Island 2
• GCN Dino Dino Jungle
• DS Luigi’s Mansion
• 3DS Toad Circuit
• 3DS Mario Circuit

Confirmed characters are:

• Mario
• Luigi
• Peach
• Daisy
• Toad
• Toadette
• Rosalina
• Waluigi
• Baby Peach
• Baby Daisy
• Baby Rosalina
• Metal Mario
• Larry
• Lemme
• Ludwig
• Dry Bones
• Dry Bowser
• Baby Mario
• Baby Luigi
• Wendy
• Morton
• Donkey Kong
• Koopa Troopa
• King Boo
• Shy Guy <– Best
• Roy
• Wario
• Yoshi
• Bowser