The image below shows a possible interpretation of the next Opel Zafira. It looks too much like a station but then maybe Opel goes for a lower MPV... don't think so.
One interesting bit is the front design, a new boomerang concept presented in the Insignia-Concept and series production Insignia OPC. It looks really nice so one wonders why it is not available in the regular Insignia and new Astra... these cars have a really bland front design. Maybe one can expect in future restylings to see that boomerang feature spread to the rest of the Opel range.