The359With more GM brands being represented (Chevrolet, Vauxhall, Opel, Buick, Cadillac, Saab maybe), the inclusion of Holden is looking better,
I found this article published in an Australian Newspaper that mentions that GT4 will include the Holden Commodore. It could just be an editorial error, but it sounds promising:
http://www.theage.com.au/articles/2004/10/15/1097784039521.html?oneclick=true
"The range of meticulously detailed vehicles is staggering and includes concept cars, historical vehicles from as far back as 1886 and highly customised street racers with superchargers.
More than 80 manufacturers are represented and there are many dream rides, including unreleased cars such as the Mazda6 MPS, BMW M5 and Ford GT. Aussie heroes include the Falcon GT and Holden Commodore ."