This is straight from holden's own mouth,
The Commodore is There own platform, they tried to build it off the omega and in the end used it to build there own bigger and and better platform, It is so highly modified now it's not even the omegas son or daughter maybe a cousin. Longer wheelbase wider higher longer. And they call it the V. They were 12 months away from importing the Omega into the country and got a brain wave to try and modify it's platform, That failed so they just built it from scratch still usesing it as there guide only better.
The earlier VN-VS were so much Omega. So what is the omega based off, If it's based off the catera there is the answer.
"Just a matter of time i suppose"
"The elevator is broke, So why don't you test it out"
"I'm not trapped in here with all of you, Your all trapped in here with me"