Some interesting things I discovered while *virtually* in one of the massive switchback rooms.. There are 2 walls on either side of the switchbacks, one wall has 6 flags w each representing a member of team Mario (Mario, Luigi, Peach, Daisy, Toad, Yoshi) and the other side of the wall has 8 flags w each representing a member of team Bowser including Bowser and his 7 Koopalings (Larry, Roy, Lemmy, Wendy, Iggy, Morton, Ludwig).. so I'm guessing that the reason there are 6 flags on team Mario and 8 on team Bowser is because we, the guests take up 2 carts on team Mario and complete the even 8 cart match.
So this could confirm that we will be throwing shells/items etc. at Bowser and his 7 Koopalings and not at each other...
I guess I was expecting more of a chaotic free for all Grand Prix style ride instead of a VS Battle