There's a NASCAR contest everywhere you turn these days.
I'd like to have one with Cup, Busch (Nationwide next year), Trucks, ARCA, NHRA (Top Fuel, Funny Car, Pro Stock & Bikes), Formula One, Indy Car, COORs Off Road Championship Series, World of Outlaws Sprints & Late Models, etc...
Any or all of the above, with some ATV, Snowmachine & Motorcycle racing, along with maybe some USHRA Truck & Tractor pulling and Monster trucks as possibilities also.