Like the earlier hatch prototype, it's hard to make out too many of the final car's styling details due to the extensive camouflage and numerous false body panels.
In addition to gaining a boot and a longer rear overhang, it seems as though the sedan will also feature altered rear doors, and a different front-end design.
It should be noted that the smooth, rounded front bumper and integrated waterfall grille seen here are all part of the prototype's disguise, while the lights underneath the headlamp covers are temporary units.
Unlike the hatch, which is being developed with Western Europe in mind, the sedan will find greater favour in developing markets beyond Opel's home turf.
So, any differences in design might come down to the different target markets, and the fact that the sedan will likely be sold under other marques within the GM empire.
If the new Corsa sedan is sold in South America, it will wear Chevrolet badges, while any Chinese version will probably wear the Buick tri-shield.
Under the skin, the new Corsa sedan and hatch will ditch the current car's Fiat-GM joint venture platform. In its place will be a new set of underpinnings exclusive to GM. it will likely feature high-strength steel and, potentially, some aluminium in order to reduce weight, and improve fuel economy and performance.
We might see the new Opel Corsa sedan in Australia if Holden decides to switch the source of its next-generation Barina. Currently, the Barina is a rebadged version of the made-in-Asia Chevrolet Sonic/Aveo.
Given in the price sensitivity in this segment, it's unlikely that Holden will make a shift from the current arrangement.
Even if the company does decide to go for the more expensive Corsa, there's no guarantee that the sedan will be included in the local model mix as light sedans have been traditionally quite a hard sell in Australia.