I decided to browse the Google Patent search to see if Porsche has filed anything soon that might be glimpse of the next cars. I have a strong feeling this might be for the upcoming GT3. Looks racy..... 

http://www.google.com/patents?id=TQBhAQAAEBAJ&printsec=drawing&zoom=4#v=onepage&q&f=false

Edit: Nevermind, I just realized it's the same wheel for the 918! Just got too excited.