So! Given the latest update, I'd like to make a list of race cars that I think I could see coming to each of the major groups. I think I've done this before, but I think I had some new stuff to add, plus I wanted to keep it a bit more succinct by avoiding obvious stuff like how I know Gr.2 will likely get more Super GT-era GT500 cars, or how Gr.3 will likely get more FIA GT3 cars.
-Gr.1
[Cars from LMH/GTP, such as the Ferrari 499P and Porsche 963.]
[LMGTP, such as the Toyota GT-One (TS020) '99 and Bentley Speed 8.]
[Other LMP1 cars, such as the Dome S102.]
[Other Group C cars, like the un-raced Alfa Romeo SE048SP, or the Toyota TS010.]
-Gr.2
[The last of "Group One" DTM, namely the cars from AMG, Aston Martin, and BMW.]
[Late 90's GT1 cars, like the Nissan R390 GT1, but not cars that were classified as being in the LMGTP class.]
-Gr.3
[Other Group 5 cars, like the Lancia Stratos Turbo.]
[Cars that competed in JGTC-era GT500, not just including the Honda NSX '00, but also the Lamborghini Diablo GT-1.]
[Modern Super GT-era GT300 cars, like the ASL Garaiya or the Toyota Prius.]
[GT2/GTE/GTLM cars, like the BMW M8 GTE or the Lotus Evora GTE.]
[Late 00s/early 10s GT1 cars, like the Maserati MC12.]
-Gr.4
[Early 90s DTM, like the Mercedes-Benz 190E Evo II.]
[Perhaps some cars from automakers who want to join the Manufacturers Series, but would need a GT-original Gr.4 car, just as we saw with the Gr.4 cars from Suzuki and Genesis. I don't think we'll see many (if any) actual FIA GT4 cars, but I'm actually fine with that.]
-Gr.B
[Possible "Group B rejects," like those that went on to compete in Dakar or Pikes Peak soon after the end of Group B. Could the famed Dakar-spec 959 fit in?]
[Group A-era rally cars, like the Lancia Delta Rally Car '92.]
The only car that I'd love to see in the game but am unsure how to categorize, would be that Lexus LF-A that entered the N24. I'm not sure if it'd go into Gr.4 or Gr.3, but if we got a racing LF-A alongside the LF-A itself, that'd be awesome.