If the rumors prove true, Toyota will unveil a new Supra concept in Detroit next month, and it may take some design cues from the 2007 HT-TS hybrid coupe concept (above). Get all the latest auto industry news in the Executive Briefing. 

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+   Mercedes-Benz has begun production of the A Class-based GLA compact crossover at its Rastatt, Germany plant. More at Cars UK.

+   The summary of a Society of Automotive Engineers paper reveals the 2015 Corvette’s 8L90 eight-speed automatic transmission. More at Motor Trend.

+   Rumors indicate that Toyota will display a new Supra concept at the North American International Auto Show in Detroit in January. More at AutoGuide.com.

+   The debut season of the TUDOR United SportsCar Championship in 2014 will include 29 confirmed racers in the Prototype and Prototype Challenge categories. More at Racer.

+   The share price of General Motors hit an all-time high Friday, topping $40 for the first time since the Detroit automaker went public in 2010. More at The Detroit News.

+   Audi has debuted the new LMP1 hybrid racer it will campaign in the 2014 World Endurance Championship and at LeMans in 2014. More at Motorsport.com.

+   Inifiniti will unveil the Q50 Eau Rouge concept at the North American International Auto Show in Detroit next month. More at Autoblog.com.

+   Holden driver Jamie Whincup won a record-tying fifth Australian V8 Supercars title with a third-place finish in the Sydney 500, More at The Sydney Morning Herald.

For the previous Executive Briefing from December 6, click here.

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