So what are those awards exactly? And are there going to be multiple different categories (such as standard, premium, performance, concept, etc.) for whatever cars are submitted? Whatever you do, don’t forget to make a sound ruleset regarding such aspects as techpool, price, road legality (in terms of emissions, safety, etc.), among others.
There is no ruleset, there is no winner. It is not a challenge. Car shows have previously been held in car design sharing forum and I don’t see the benefit of changing that now.
For context, here are some other car shows held on the forums.
For 1980 Marten TM is showcasing the Pheaton GT-Turbo
We present our first Turbo car in a all new chassis.
3.8L I6 making 291HP and 314FTLB connected to a 5 Speed manual and a viscous LSD.
The new leather 2 + 2 layout feel firm but comfortable.
