Audi RS6 Sedan Spotted

Audi's 580 HP Sedan has been spotted out testing. What's new is that it carries features of the soon-to-be-facelifted A6, such as a different rear end and a slightly more agressive front.
http://www.worldcarfans.com/90...spied I wish GCF could also give us a non-photochopped picture of the rear, so we could try to envision what lies under the covered taillight area ourselves (because the lights and license plate holder don't integrate as well as I'd expect from Audi). I didn't think the A6's rear could be improved upon, but I'm also liking this new approach.