The Opel Monza Concept seemed to have been overlooked at the Frankfurt Motor Show. Maybe that is because GM would never give Opel the money to produce a sportscar like this. The concept is important though.
The Opel Monza Concept should be a indication of what to expect from the next Astra specifically. LED headlights and a digital instrument cluster are two features that will likely make it out of the concept and into production vehicles.
Anyways, take a look at the Monza Conept in these videos.