TCR, now there's a whole bunch of cars I'd love to see in GT7!!
I think they'd be most likely to join Gr.4, not that I'd complain. I think that much like Gr.1, the solution isn't to split the groups, but to have much more races that limit the eligible cars, like those daily races in GT Sport that limits players to the Group C racers within Gr.1, or that one 2020 Nations Cup round that limited players to the Corvette Gr.4 and the Cayman GT4 ClubSport at Laguna Seca.
On that note, I'd love for there to be a Gr.1 Manufacturers Series, as I think that since Gr.1 is for prototypes, plenty of automakers could have representation in Gr.1, between IMSA GTP, DPi, LMDh, LMP900, LMGTP, LM Hypercar, and so on. For example, Alfa Romeo could have the SE 048SP, while BMW has the V12 LMR, Chevrolet has the Corvette C7 DPi, Bentley has the Speed 8, and Aston Martin has the AMR-One.
I mean, I would say that I'd like it for Gr.1 itself to join the Manufacturers Series, but I don't know if there's enough overlap, even if we did include every potential prototype from those real-world classes I mentioned. So I think the Manufacturers Series could have a sub-series for each racing class, including Gr.4, Gr.3, Gr.2, Gr.1, and even Gr.B. For Gr.2, that could be especially interesting if they add modern DTM cars as well as the newer GT500 GR Supra, as that'd add five automakers to Gr.2, between Aston Martin, BMW, Audi, Mercedes-Benz, and Toyota. Heck, maybe even one of Opel's last DTM racers could come along, too.
One thing I still wanna know is where the late-90s GT1 cars will fit in. I'm betting on either Gr.2 or Gr.1, especially since some of those cars were eventually put into prototype classes, like the Toyota GT-One TS020 and the Panoz Esperante GTR-1, the latter of which was later turned into the Panoz GTP. What's interested is that if we get the McLaren F1 GTR Longtail back, I don't think it'd go into Gr.3, so fans of the McLaren F1 could potentially have multiple classes of the F1!
But one thing we do know is that mid-90s and late-00s/early-10s GT1 cars would go into Gr.3, as we can see with the '95 F1 GTR and the Aston Martin DBR9. That could allow some interesting stuff into Gr.3, like the Toyota Supra LM, or the Nissan Skyline GT-R R33 LM - and I'd love to have the latter with its rare homologation road-going model, which I had the luck to see in-person once at the NY International Auto Show! Then there were the later GT1 cars from the late 00s/early 10s, though outside the Saleen S7-R and Maserati MC12, I'm not sure what else could really be added without seeming redundant. Sure, there's the GT1-spec Nissan GT-R, but we already have a GT-R GT3. I suppose if they really wanted to, they could add the GT1-spec Chevrolet Corvette C6 and the Lamborghini Mucielago? But I also really want that GT1-spec Diablo that we've seen in prior GT games, too...