With the new Astra hatch already unveiled and detailed at the beginning of June, the majority of this prototype's camouflage is concentrated on its hindquarters.
It's impossible to see, at least in these photos, whether the new Astra wagon's D-pillar will feature the same radical blacked out rhomboid treatment that's applied to the hatch's C-pillar.
Around the back, the wagon seems to be using a set of tail-lights similar to the ones used in the five-door hatchback. On the roof are a set of shiny metallic roof rails.
The new Astra range employs a number of engineering solutions to reduce weight, including the use of high- and ultra-high-strength lightweight steel, and compact subframes. The next-generation hatch is said to tip the scales at between 120 and 200 kilograms less than the current model.
Opel has yet to provide all the details about the new Astra's drivetrain choices, but we know that at launch options will include a 77kW 1.0-litre direct-injection turbocharged three-cylinder petrol engine, a new aluminium block 107kW/250Nm 1.4-litre turbocharged four-cylinder petrol engine, and a base 70kW 1.6-litre turbo-diesel motor.
Among the tech features available on the next-gen Astra will be adaptive matrix LED headlights, automated parking, lane keeping assistance, automated emergency braking, and a reversing camera.
The new Astra five-door hatchback will make its public debut at the Frankfurt motor show, which takes place in the middle of September.
With Holden targeting Toyota's sales supremacy, it's widely believed that the new Astra hatch will be sold locally in the near future wearing Holden badges. It's unknown, at this stage, whether the new Astra wagon figures into the company's Australian plans.