Chevrolet to introduce the 2015 Corvette Z06 at the 2014 Detroit Auto Show
2015 Chevrolet Corvette 06 teaser
January debut

So now we know when it will happen as earlier today the General's Chevrolet division released a teaser image of a new high-performance Corvette model along with the following press release:

Most-capable Corvette ever will lead industry's broadest range of performance cars

DETROIT – Chevrolet will introduce the 2015 Corvette Z06 next month at the North American International Auto Show in Detroit. It will be the most track-capable Corvette ever, designed to deliver supercar levels of performance through unique powertrain, chassis and aerodynamic features.
2014 Camaro Z/28
The Corvette Z06 will complete Chevrolet's performance car lineup, which will also see the addition of the Corvette Stingray Convertible, Camaro Z/28 and SS sedan.

"Chevrolet is America's favorite performance car brand, and for 2014 we are going to offer enthusiasts more choices than ever before," said Alan Batey, senior vice president, Global Chevrolet. "No other manufacturer will be able to match the breath of performance cars from Chevrolet."

2014 Chevrolet SS