It's just a pity PD didn't update Indy to the current layout; setting aside the questionable fiddly bit they put at the south end, the current infield is much, much better with the elimination of the terrible little esses.
Anyway, maybe it will turn out like Silverstone, where I thought I was terrible but ended up being quite quick! (not bloody likely

)
To save anybody else the trouble of digging through the thread like I just did, the tracks/cars VCRC has used (in GT6) so far are:
Bathurst (Abarth 500)
Apricot Hill (Plymouth XNR Ghia)
Silverstone GP (Toyota GT2000)
Grand Valley Speedway (Renault R8 Gordini)
Various Short Tracks (Limbo Stick Cup)
Nordschleife (Abarth 1500 Biposto)
Brands Hatch Indy (Honda S800 Race Car)
Autumn Ring Mini (Toyota Sports 800)
Eiger Nordwand Short Course (Alpine A110)
Grand Valley Speedway ('70 Skyline)
Monza (Alfa Guila Sprint GTA)
Motegi Road Course (Isuzu Bellet 1600)
Laguna Seca (Screaming Chicken aka '78 Trans Am)
Nurburgring GP (BMW 2002 Turbo)
Silverstone GP (Lotus Europa Special)
Indy Road Course (Mazda Cosmo)
Suzuka (Mk1 Golf)
(let me know if I missed any)

I wouldn't have suggested Silverstone last week if I had remembered that y'all had already done that one before I joined VCRC....
Real-life unused Tracks that would be good for future events:
Fuji (both)

Spa Francorchamps

Circuit de la Sarthe

Willow Springs

Daytona Road Course

(even Tsukuba maybe, for the right car

)
oh and Ascari I suppose
As far as original tracks go, there's still Autumn Ring full, Cape Ring variants, Deep Forest, Trial Mountain, and Matterhorn variants. (Personally, I think a half light/half dark race at Matterhorn Dristelten could be fantastic [hellish too, but still fantastic] provided the car involved had great lights...

)
Then there's all the Street Courses.... :/
edit: oh and it's worth reposting the link to
this spreadsheet that @
kcheeb posted much earlier in the thread... handy for sorting cars by pp and year.
edit again: I'm going to update this post occasionally