Scion has started work on a baby brother for its Scion FR-S. The Japanese car maker has also reportedly begun development of a revived Supra to sit above the affordable two door FR-S, and is now turning its attention to fulfilling the three-tiered lineup it promised by drawing the framework for a lightweight sub $20k rear driver. The chief engineer for the FR-S (86), Tetsuya Tada, confirmed Toyota has commenced early development work on the baby sportscar, but would not divulge too many details as he is not overseeing the project. "We have started on the car below the FR-S (86)," he told the website Drive while in Australia this week to celebrate the cars first anniversary. "It is not yet decided if it will be two-seat or two-plus-two; we are developing the concept now." But he did ensure the car will share the same fun-to-drive DNA as the FR-S (86) and won't be compromised by being based on an existing small car platform such as the Yaris or Corolla. "Rear wheel drive is the best solution for sportscar handling so this will be true for all three Toyota sportscars," Tada added. Just how small the baby 86 will be is not yet known, but Tada admitted it won't be a Japanese-style Kei car replacement for the Daihatsu Copen but a city-sized coupe designed to thrill even in congested large cities such as London, Tokyo and New York. Similarly, what powertrain will drive it is also still under wraps. But, as it is doing with the larger Supra-style coupe which is expected to feature a hybrid 3.5-litre V6, Toyota is keen on developing road-going applications of its super capacitor hybrid system it uses in its Le Mans-type sportscar racing program. Toyota just revealed a Yaris Hybrid R concept at Frankfurt motor show that showcased just how this technology could be adapted into its three-tier sportscars.