For now, Toyota has confirmed only the concept will utilise technology drawn from its TS030 Le Mans racer.
In the form of the Yaris Hybrid R, that means a 1.6 litre petrol 'Global Race Engine' mated to a pair of electric motors charged by two super-capacitor generators that harvest the car's braking energy.
And, while the carmaker is staying quiet, we can likely expect power to go to all four wheels. Full performance details are still to be revealed, but it is believed the Hybrid R concept will deliver nearly 300kW.
On the styling front, the concept builds on the regular Yaris hatch's styling with a unique front bumper design, skirts all-round and large alloy wheels at the corners.
Whether we'll see the Yaris Hybrid R in production remains to be seen, although it is unlikely that such a package could be offered at an appropriate price point.
Still, Toyota has confirmed the Hybrid R technology could be used in a production model, suggesting we could yet see a Supra Hybrid R in the carmaker's future line-up.