I'm inclined to agree and it was your comments about the Japanese and Korean brands that really got me thinking.
My thoughts are that by keeping the body of the Holden similar, same panels, maybe different lights and body kit to current models the car will externally show it's family roots and keep the costs of production down.
New tooling is massively expensive and would probably stop the project as the amount of units sold wouldn't justify the costs of development per year.
Add an impressive spec,
4 Heated and cooled leather seats with 3 memory settings, heated steering wheel and gear selector, night vision, adaptive cruse control, rain sensing wipers, radar parking, touch screen satellite navigation, head up display, in built communication centres for all four seats, front seat headrest monitors for internet, DVD/CD or radio.
The xenon lamps with beam levelling and LED rear lights adding safety to night with automatic cornering and dimming technology like the new Astra.
Auto dimming mirrors and onstar all wrapped in soft touch materials, leather dashboard with cchromed switches, keyless entry and high gloss wood or chrome trim.
Propelled along by a 6.2 V8 with 500hp and a 7 speed automatic gearbox with traction control and 4pot callipers all round in silver with ABD and EBD.
Maybe a self parking option, sun blind ?
These are just my thoughts but add a different steering wheel design and I think it would stand a chance sold at £60,000 especially when the options list could be reduced to wheel styles and sizes and colour combinations of leather and external paint ?
In my view the premium Germans brands would struggle to spec a similar size car with this amount of kit.