Since you made the thread... Here's the "Concept GT6" events list based on
this wishful car list (
+ RMs) and this very wishful
track list. I'll spare you all the details and regulations. "Concept GT6" has 180 events in total contained between the 6 halls.
International Hall (Aspec only)
Amateur Events (No race cars, 2-3 lap races)
Sunday Cup (C, 3 Single Races)
Clubman Cup (B, 3 Single Races)
FF Challenge (C, 3 Single Races)
FR Challenge Am (B, 3 Single Races)
4WD Challenge Am (B, 3 Single Races)
Super Hot Hatch Trophy (B, 3 Single Races)
-Restricted to hot hatches
World Compact Car (B, 5 Race Championship)
World Classic Car (A, 5 Race Championship)
-road cars from 1979 or earlier
80s Festival (B, 4 Single Races)
-road cars from 1980 to 1989
Spider and Roadster (B, 3 Single Races)
-AI use cars in the range of 170-240 hp, road cars only
GT Cup (A, 5 Race Championship)
-Road cars only, AI use sports cars between 300 and 400 hp
Professional Events (3-5 lap races)
Supercar Festival (IC, 5 Single Races)
FR Challenge Pro (A, 3 Single Races)
4WD Challenge Pro (A, 3 Single Races)
MR Challenge (A, 3 Single Races)
NA Sports (A, 5 Single Races)
Turbo Sports (A, 5 Single Races)
Tuning Car Cup (IC, 5 Race Championship)
Boxer Spirit (IC, 3 Single Races)
Street Circuit Tour (IB, 8 Single Races)
Permanent Circuit Tour (IB, 8 Single Races)
Rising Stars Formula Cup (IC, 10 Race Championship)
-Formula 250 only, 5 lap races
Megaspeed Cup (IC, 3 Single Races)
-Road cars only, AI use 700+ hp road cars, 5 lap races on banked high speed circuits
Gran Turismo World Championship (IA, 10 Race Championship)
-AI use LMPs and GTPs, 10 lap races
Expert Events
Dream Car Championship (S, 7 Race Championship)
-AI use fantasy LMs and RMs, 15 lap races
Gran Turismo All-Stars (IA, 10 Race Championship)
-GT's hot pot, AI use LMPs, GTPs, LMs, RMs and Group C cars, 10 lap races, all circuits from previous GTs
Clubman Formula Racing (IA, 12 Race Championship)
-Formula Clubman only, modeled after GP2 championship, 20 lap races
Like the Wind (S, 1 Single Race)
-5 laps of SSRX, AI use LMPs, GTPs and Group C cars
Premium Sports Car Lounge (IB, 6 Single Races)
-Road cars only, 10 lap races, AI use GTs and high-end expensive sports cars
Polyphony Digital Cup (S, 10 Race Championship)
-No tuning, road cars only, 20 lap races
Classic Race Car (IA, 7 Race Championship)
-Race cars from 1979 or earlier, typically 10-15 lap races
Global Endurance Series (S, 10 Race Championship)
-AI use modern LMPs, ~350 km races
World Grand Tour Challenge (IA, 10 Race Championship)
-480 hp limit, AI use RM2, STC, GT2 and old DTM cars, 15 lap races
Formula GT World Championship (S, 15 Race Championship)
-Formula GT only, ~305 km races (except Cote d'Azur)
World Touring Trophy (IA, 10 Race Championship)
-AI use ~300 hp Touring Cars, lap count based on real WTCC race lengths
Group C Series (IA, 5 Race Championship)
-Group C cars, 10 lap races
North American Hall (Aspec only)
American Events
Stars and Stripes (B, 3 Single Races)
-American road cars only, 450 hp limit, 2 lap races
US Open (IC, 5 Race Championship)
-Open to all American cars, AI use US supercars, 3 lap races
Classic Muscle Car (A, 5 Race Championship)
-American road cars from 1979 or earlier
Vette! Vette! Vette! (A, 5 Single Races)
Viper Race (A, 5 Single Races)
Pony Car Crazy (B, 5 Race Championship)
-Camaros and Mustangs only
American Endurance Series (IA, 4 Race Championship)
-AI use modern LMPs, 100 mile races
NASCAR (IB, 8 Race Championship)
-NASCARs only, 8-15 lap races
Indianapolis Series (IA, 10 Race Championship)
-Formula Clubmans only (600hp, 675 kg), 10 lap races on ovals and other American courses
American GT Championship (IA, 7 Race Championship)
-630 hp limit, AI use LMs, GT1 class cars and RM1s, 10 lap races
Canadian Events
Canada Cup (IB, 5 Race Championship)
Asian Hall (Aspec only)
Japanese Events
Type R Honda (A, 5 Single Races)
-Honda Type R cars only
NSX Reunion (IC, 5 Race Championship)
Kei Sports (C, 3 Single Races)
-Kei cars only
Japanese Street Legends (B, 3 Single Races)
-Japanese road cars from 1989 or earlier only
Club “RE” (A, 3 Single Races)
-rotary engine cars only
NR-A Roadster Cup (IC, 5 Race Championship)
NR-A RX-8 Cup (IC, 5 Race Championship)
Evolution Meeting (IC, 3 Single Races)
Race of Red Emblem (IB, 5 Race Championship)
Silvia Sisters (A, 3 Single Races)
Club Z (A, 3 Single Races)
Subaru BRZ Gathering (A, 3 Race Championship)
Stars of Pleiades (IC, 5 Race Championship)
-Subaru cars only
Suzuki Kei Car Trophy (B, 3 Single Races)
Altezza Race (IC, 5 Race Championship)
Toyota 86 Trophy (IC, 3 Single Races)
Vitz Race (IB, 5 Race Championship)
All-JGTC (IB, 10 Race Championship)
-AI use JGTC cars from 1997 to 2003, 5 lap races
Super GT GT300 (IC, 10 Race Championship)
-Super GT300 only, 20 lap races
Super GT GT500 (IA, 10 Race Championship)
-Super GT500 only, 20 lap races
Japanese 90s Challenge (A, 3 Single Races)
-Japanese road cars from 1990 to 1999
Japanese Compact Car (B, 5 Race Championship)
Formula Nippon (IC, 5 Race Championship)
-Formula 250 only, 5 lap races
Japanese Championship (IA, 7 Race Championship)
-Open to all Japanese road cars, 10 lap races
Korean Events
Genesis Meeting (B, 5 Race Championship)
European Hall (Aspec only)
French Events
Megane Trophy (B, 5 Race Championship)
Clio Cup (IC, 5 Race Championship)
208 Cup (A, 5 Race Championship)
GT by Citroen (IA, 3 Single Races)
Twingo Trophy (A, 3 Race Championship)
DS Club (IC, 3 Race Championship)
Formula France (IC, 5 Race Championship)
-Formula 250 only, 5 lap races
Tous France Championnat (A, 5 Race Championship)
-Open to all French road cars, 3 lap races
French GT Championship (IA, 7 Race Championship)
-630 hp limit, AI use LMs, GT1 class cars and RM1s, 10 lap races
British Events
Mini Challenge (A, 5 Race Championship)
MG Festival (B, 3 Single Races)
Elise Trophy (IA, 5 Race Championship)
Evora Cup (IC, 5 Race Championship)
Aston Martin Carnival (IB, 5 Single Races)
Tuscan Challenge (IB, 5 Race Championship)
British Lightweight Race (IC, 5 Single Races)
Formula UK (IC, 5 Race Championship)
-Formula 250 only, 5 lap races
British GT Car Cup (IB, 3 Single Races)
-Open to all British road cars
German Events
M3 Rennsport (IB, 5 Race Championship)
Meisterschaft S4 (IC, 5 Race Championship)
Tourist Trophy (A, 5 Race Championship)
Speedster Trophy (A, 5 Single Races)
1-Series Trophy (B, 3 Single Races)
Club “M” (IC, 5 Single Races)
GTI Cup (B, 3 Single Races)
Beetle Cup (IC, 5 Race Championship)
Up! Cup! (IC, 5 Race Championship)
A1 Challenge (A, 3 Single Races)
Legends of Silver Arrow (IB, 5 Single Races)
Legacy of CLK (IC, 3 Single Races)
Schwarzwald Liga A (A, 5 Single Races)
Schwarzwald Liga B (IB, 5 Single Races)
DTM (IA, 10 Race Championship)
-DTM cars only, AI use 2012 DTM cars
German GT Championship (IA, 7 Race Championship)
-630 hp limit, AI use LMs, GT1 class cars and RM1s, 10 lap races
Italian Events
Festival Italia (B, 3 Single Races)
Alfa Trophy (A, 3 Single Races)
Essence of Maserati (A, 3 Single Races)
Pagani Avant Garde (IB, 3 Single Races)
Lamborghini Exclusive (IC, 4 Single Races)
Gallardo Trophy (IB, 5 Race Championship)
La Festa Cavallino (IC, 5 Single Races)
Dino Heritage (IB, 5 Race Championship)
-V8 engined Ferrari road cars only, 5 lap races
Ferrari Classics (IC, 3 Single Races)
-Ferrari road cars from 1989 or earlier only
Formula Italia (IC, 5 Race Championship)
-Formula 250 only, 5 lap races
Italian GT Championship (IA, 7 Race Championship)
-630 hp limit, AI use LMs, GT1 class cars and RM1s, 10 lap races
Spanish Events
Copa del SEAT (A, 5 Single Races)
European Events
Pan European Tour (A, 5 Race Championship)
-European road cars only, AI use 300-400 hp European cars
1000 Miles!!! (IA, 4 Race Championship)
-European road cars from 1969 or earlier only, 4 races total 1000 miles
Europa Supercar Trial (IC, 5 Single Races)
-European road cars only, AI use European supercars
Euro Hot Hatch (A, 5 Race Championship)
-European hatchbacks only
European Touring Car (IB, 5 Race Championship)
-AI use ~300 hp Touring Cars
European Endurance Series (S, 6 Race Championship)
-AI use modern LMPs, ~250 km races
European GT Championship (IA, 7 Race Championship)
-630 hp limit, AI use LMs, GT1 class cars and RM1s, 10 lap races
Endurance Hall (Aspec and/or Bspec) (All IA, 1 Single Race)
Grand Valley 300km
-60 laps
Indianapolis 500
-200 laps
Laguna Seca 200 miles
-90 laps
Passage to Colosseo
-No tuning, road cars only, 2 hour race at Rome Circuit
Trial Mountain 2HR
-No tuning, road cars only
Tsukuba Roadster
-Mazda Roadsters only
Tsukuba 9HR
-Road cars only, AI use Japanese cars
Suzuka 1000km
-Super GT500 cars only, 172 laps
Fuji 1000km
-AI use LMPs and Group Cs, 219 laps of Fuji F
Nurburgring 4HR Endurance
-Road cars only
Nurburgring 24HR Endurance
1000km of Spa
-AI use modern LMPs, 143 laps
Monza 1000km
-AI use modern LMPs, 173 laps
Macau Grand Prix
-480 hp limit, AI use RM2, STC, GT2 and old DTM cars, 50 laps
Brands Hatch 1000km
-Group C cars only, 238 laps
Bathurst 12HR
-road cars only
Tokyo R246
-630 hp limit, AI use LMs, GT1 class cars and RM1s, 100 laps
SSR11 All-Night
-150 laps
6 Hours of Dijon
-480 hp limit, AI use RM2, STC, GT2 and old DTM cars
Mistral 78 Laps
Imola 300km
-630 hp limit, AI use LMs, GT1 class cars and RM1s, 60 laps
Montreal 200 miles
-480 hp limit, AI use RM2, STC, GT2 and old DTM cars, 74 laps
Sepang 400km
-630 hp limit, AI use LMs, GT1 class cars and RM1s, 72 laps
Road America 200
-630 hp limit, AI use LMs, GT1 class cars and RM1s, 50 laps
Circuit de la Sarthe 24h
-AI use modern LMPs
B-spec Hall (Bspec only)
TBP (30 Events divided equally between Beginner, Intermediate and Advanced)
I've separated the 6 event halls from the special events hall.
Special Events: Special events contains Karting Experience (much expanded), GT Rally (centralized into a "world championship" and expanded), Time Trials, Missions, AMG driving school and other special events.
Notes on prizes: All single race events will have one one-time prize for event completion (winning all races). For Championship type events, there will be a carousel of 4 cars and you will randomly receive 1 of them. In some cases, all four prize cars will be the same car (for example, in Rising Stars formula you can only win the next formula car). In some cases, the carousel will feature only 2 different cars among the 4.
In Endurance races, the prize carousel will pick among only 2 cars. In the B-spec hall, there will only be one-time car prizes for completing all the Beginner Events, all the Intermediate Events, all the Advanced Events and finally for completing the entire Hall.
Weather: All events that require a C, B or A license would not have weather and would all be dry races. Variable weather would be implemented in events that require IC, IB, IA and S licenses, with the exception of the "Megaspeed Cup" and "NASCAR", which would both be always dry. Of course, there would be no weather at ovals in the game at all.
Note on Endurance Hall: In endurance races, you would have the option of bringing in 1 b-spec driver with you (2 in the 24 and 12 hour races). You would switch drivers during pit-stops like in GT4.
Note on B-spec Hall: Regulations would be tight so it would be an actual challenge, tuning and strategy would be vital. Prize money would be low and single event prizes would be paints and gear to prevent excessive grinding. However, the prize cars for completing the entire hall would be rare, as incentive to get this part of the game completed.
Note: For race car events in the regional halls, there would be no car nationality restrictions on car used. As in reality, cars from around the world race in ALMS, BTCC etc. and there should be no restrictions to prevent an Audi LMP to race in the "American Endurance Series" event or a Honda Accord Touring Car from racing in the "European Touring Car" event.