UK magazine Autocar is reporting today that +Audi International is working on a plans for a supercar powered by a diesel engine with a flywheel-hybrid-electric system much like the Le Mans-winning R18 e-tron quattro. About a month ago I speculated pretty much the same thing https://plus.google.com/114133424228405038490/posts/jD87pkgvvP6 following the rumors that Audi was scuttling it's plans to build a battery-electric version of the R8. 

The difference here is that Audi is guessing that this diesel hybrid would be a new model above the R8. It's entirely possible that such a model could be derived from the R8 platform while gaining a new name like R10.  I'd certainly love to try out a car like this regardless of what it's called.