Honestly... I'm surprised that it took this long.
My guess is that Audi / Lamborghini is trying to send a message out to everyone working on the Aventador's that they are watching and will be going after anyone releasing a body. Why else would Lamborghini care about the the now out of production Murci and why aren't they focused on anyone still making the Diablo and Countach bodies?
I think this is more preemptive on Lamborghini's behalf given the flood of Aventador inspired bodies that are soon to hit the market and are surely what's really worrying them.
Chris