I've noticed (as you probably have if you read the Dupont registry for fun) that there are thousands of hopeful ultra-exotic car companies waiting for a big break that will never come. I mean, who's ever heard of the Zenvo ST1? What about the Weber Sports Cars Fastest One or the sporty A.D. Tramontana? All of these cars are real and for the ultra-rich, but are barely known.
P.S. The site where I got these photos, http://www.ultimatecarpage.com/, is pretty much the best page for auto photos of many cars past and present.