Sugo is probably the most awkward, backyard track Super GT race at. Wouldn't be that far off tracks here. DTM race at some pretty bumpy venues. Tracks here really aren't bad to accommodate Super GT. Being that VASC being an international series, some tracks have been upgraded as per FIA standards. I don't know if the tracks conform to JAF=GT Association(?).
Adelaide- F1 & GT3, would be good for SGT
Albert Park- F1 & GT3
Simmons Plains- is a bit like Norisring
Phillip Island- GT3
Perth- GT3
Winton- GT3
Darwin- no problem
Townsville- GT3
Ipswich- no problem
SMP- GT3
The Bend- GT3
Sandown- GT3
Bathurst- F1 demo, GT3
Gold Coast- open wheelers raced here, SGT could work
Pukekohe- resurfaced
Newcastle- probably the most out of place on the calendar for SGT
I'd say lap times at the shorter circuits, Simmons Plains, Perth, Ipswich, Pukekohe and Newcastle, would probably have to be reworked to timed races. 100+ laps at Newcastle, might be a bit much.
With more downforce, lighter weight, bigger tyres, the racing could be just as exciting. Maybe true about the fan base, ticket sales would be something watch. However much some complained about Nissan and AMG came in, many warmed up to new manufacturers and were receptive to Volvo joining(even more angry when they left).
Anyway, can't wait to see how the MARC IIs go on the mountain. A MARC V8 is already 1230kgs. The new one is supposedly lighter, with more power at 625hp(up from 500hp). I don't know if Skaife is coming up with ideas for the cars, but as some very good points were made in the above posts, I wonder what the teams would want, moving forward.