One of the highlights this year was to see the actual 1966 Le Mans winning Ford GT40 Mk II return to France and race in the Le Mans Classic. The last time we saw the ex-Bruce McLaren and Chris Amon on track at Le Mans was in 2006 and then it was only demonstrated. Since then, it has changed hands, and was comprehensively restored. In addition to racing at Le Mans, the American enthusiast owner also demonstrated GT40P/1046 at the Goodwood Festival of Speed.
Another great racing car that starred at Le Mans was this Audi R8. Strictly speaking this did not constitute as a return as this particular chassis was not raced in period. Now privately owned, '606' is actively raced and we also snapped it in action during the Spa Six Hours later in the year.
Today, German racing car specialist Reiter Engineering revealed a teaser video of the all-new Xymera. No further details were released but it looks like the car may be a mix of the KTM and Lamborghini race cars Reiter is very familiar with.

Enjoy the links:

2005 Audi R8 - Chassis 606 - Ultimatecarpage.com

1966 Ford GT40 Mk II - Chassis GT40P/1046 - Ultimatecarpage.com

2019 Reiter Engineering Xymera - Images, Specifications and Information