You really want honesty?
Well, where do I start...
Its a cool idea and would be pretty awesome, but its' not feasable. A world wide car club? OK, say you have a show... do you really think tons of European car owners are going to pay over $3,000 to ship their car to and from the states for some car show? Well, living in europe now i'm going to go out on a limb and say "hell no". No offense, but its just not even close to being worth that kinda money. Hmm, what should I do? Go to a car show or drop a full-up turbo kit in my car... decisions, decisions. Thats what LOCAL clubs are all about and LOCAL car shows. Alot of times LOCAL clubs are throughout the states but broken up into chapters which are locatd in different cities. I've been in car clubs since i've had a car and i'm just telling you right now it won't work. Its hard enough to get a chapter to drive out of one state let alone a bunch of individuals to drive to god knows where over how many states and seas for a show.
Sorry to burst your bubble, but I dont see it happening. It would be great, but think reality. BUT, if it does happen i'll buy you a plane ticket here so you can personally slap me for being a dick, haha.
Good luck on it, honestly.