Lamborghini Preparing Reventon Roadster?

A new rumour says that Lamborghini is preparing a Reventon Roadster as a final farewell to the Murciélago. The limited-production Reventon was technically based on the Murciélago LP640. A Reventon Roadster would most probably use a rag-top for its roof and be even more exclusive than the coupe. Apparently just 9 cars will be built.
Power will come from the 6.5-litre V12 engine which makes 670hp (493kW) and 660Nm (487 lb-ft) of torque. Lamborghini is introducing new models at a much higher frequency than it ever has before. Only weeks ago it unveiled the Murciélago LP 670-4 SuperVeloce (SV), the fastest Lamborghini ever made. Before that we saw the Estoque four-door concept car being unveiled.