Im thinking someone (probly not me... bc im pressed for time...) should work up some challenges for like tuners/tuning like on hotversion and have em run 5 or whatever laps from a standing start on tsukuba. Maybe set up some guidelines each event that are diffrent than the last. Maybe "rotary challenge, 455PP, HP limit at X amount" Or "FF layout, Street tires, under 2800lbs factory weight" or maybe "4cylinders vs 6's". I see so much potential with the sheer number of cars. i doubt anyone would bring the exact same make model trim level etc as someone else. with 50 S2K's and like 200 Skylines... yeah.
Heck it can even be at motegi or Suzuka sometiems seeing as they had em there before too.