There are many comparison between the Cascada and Audi A5 Cabriolet. So why not an OPC variant to fight S5 Cabriolet? Rendering the OPC out of the standard Cascada, the car gains new front grill and fascia, bigger wheels, side skirting and de-chromed stripe for the DLO.
Can’t remember where I read it but there could be a coupe variant of the new Cascada. I am not sure if they would, or should revive the Calibra name though.
It’s only a matter of time GM rebadges the Opel/Vauxhall Cascada as a Buick for North America and China.