Why isn't samus in a mario kart game?

[The Ghost of RubangB]

Well damn, how fast can Samus roll in morph ball mode? It would be really awesome if it was a comparable speed and this somehow worked out. You could have Samus in a ball, Mario in a Kart, and then Sonic on foot!

Actually, this just reminded me of my ultimate crossover racing game fantasy. I call it "Rubang's Childhood: The Racing Game." Here are some of the characters:

Optimus Prime as a truck
Hot Rod as a car
The Ecto-1A full of Ghostbusters
The Pizza Van full of TMNT Turtle Power
The ThunderTank, driven by Panthro
The Batmobile, driven by Batman
KITT, driven by Michael Knight
A 1963 Aston Martin DB5, driven by James Bond
The Mystery Machine, driven by Shaggy
A cloud, (now get this) driven by a Care-Bear OR A LAKITU
Any fucking Dino-Rider on a dino
Mr. T in his van
Rainbow Brite riding on her horse Starlite
He-Man riding on Battle Cat

Yeah, it's 5:15 am on the west coast, and I'm drunk as hell. What are you gonna do about it?

(Hint: add to my list for the ultimate 70's/80's franchise racing crossover. I'm sure I forgot something.)