I found an old Nintendo book titles " Ultimate Unauthorized Nintendo Game Strategies" in my desk. As I was flipping through it I was reading previews of up coming games. I can't say I remember this game. Did they change the name before being released or what? It says you can design your own race car then try them out on some tracks.

Matchbox has around 10 games that were in early stages of production and got canned.  There are screenshot floating around for most of them, others just got a few little blurbs in random gaming magazines.