This is simple what do you see Zeta being used for.

So far we know Zeta will be RWD/AWD capable. There may be 2 different wheel bases. The engines will include at least 1 V8, a pushrod V6 (3.5 and 3.9 Liters), a OHC V6 (2.8-3.8 Liters), and Turbo 6s are a possibility.

Here are the bodies that I see coming from Zeta:

A LWB Sedan
A SWB Sedan
A LWB crossover wagon/SUV (think holdne V car SUV)
A SWB crossover for Saturn/SAAB
A LWB Coupe (GTO & Monaro)
A SWB Coupe (Camaro & maybe a Opel version w/v6 only)
An El Camino (made in AUS)

What else could Zeta give us but would be less likely?

I think we could see a 4 door truck/car SUV like the HSV Avalanche
I think we could see a few deisel motors (mainly EU)

What can we say Zeta will give us that I don't have listed here?