Also if you paid attention, there are 24 slots at the Starting Grid. That's double the amount in MK8. There is also a new in game brand called Luigi Tires, and the car atop Fire Flower Gas Station has an antenna, likely a nod to Smart Steering. Back to the 24 slots, this might mean the following:
Team Races and Battles might have double the amount of players.
Grand Prix might be even more of a nightmare.
Maybe the return of Battle on the race courses?