I'd definitely like to see more cars for the brands that haven't had additions in a very long time, like Mini and Hyundai. The former could even get a Gr.4 racer! But the latter could get a ton of stuff, like the N versions of the Veloster and Elantra, and maybe even a TCR Elantra as a newer Gr.4 entry. Plus even the older Tiburon.
Think this could win the GT Award?
I saw that, too, and as much as I like it, I'd personally much rather have a more contemporary Toyota Gr.B car based on the GR Corolla or GR Yaris, whether that means actually licensing an actual WRC car or not. But speaking of the WRC - and more specifically, the 90s era where we've gotten entires from Subaru and the aforementioned Toyota, I could definitely see similar entries from Lancia and Mitsubishi coming. Heck, I could see Lancia getting three Gr.B cars - the 037, the Delta S4, and the Delta Integrale.
EDIT: I think certain automakers that already have a VGT could make another, not only to reflect their newer design philosophies, but also to potentially provide racecars that could fill certain niches. For example, I'd love to see a hybrid version of the Jaguar VGT SV, if only so that brand can get a Gr.1 car. I'd especially like to see Mitsubishi and Subaru each make another VGT, and this time, they could even both be in Gr.B, even if Mitsubishi's hypothetically additional entry would be based on the Outlander or something.