According to a report from Autocar, Mazda is currently working on a successor to the old RX-7 and the current RX-8. Believed to carry the RX-9 nameplate, the next-gen sports car is tipped to ditch the innovative but clumsy quasi-four-door layout of the current RX-8, and that the platform is to be spun off from the MX-5 roadster.