Mazda has been testing its RX-8 Hydrogen RE for more than two years now – most recently known as the Premacy Hydrogen RE Hybrid. The hydrogen/gasoline dual-fuel engine is mated to a hybrid system that converts energy from hydrogen combustion to electricity and uses it to power the motor. Mazda will drop the RX-8 name and will go with the RX-9 nameplate. The car is expected to be rear-wheel-drive and will take major styling cues from the Taiki Concept. Sales are likely to kick off in 2012.