Nissan's engineers are looking at two possibilities at the moment. The first one is a hybrid set-up where one or more electric motors will help to boost the car's performance and depend on recovered brake energy for power.
Nissan introduced the Infiniti Essence Concept with a similar hybrid technology a few years back and the concept was able to make around 600bhp. But, the heavy weight of the batteries used for the hybrid system was a real let down for the engineers at that time.
The other option is a simpler one which utilises an electric motor to power up supporting items such as lights and etc. this will help to greatly reduce the load of the engine. Additionally, it will also help to boost performance by being mounted to the gearbox. The next GT-R might also feature engine stop-start technology and cylinder deactivation in order to improve fuel consumption.
Introducing hybrid technology on supercars will have some benefits. Other than reducing emissions level and improving fuel economy, electric motors will give the car instantaneous torque, improved traction control (especially for all wheel drive cars) and increased range through reduced fuel consumption.