https://carbuzz.com/news/exclusive-audi-will-bring-the-a6-and-rs6-avant-to-the-us
We've known for a while that Audi is working on a new RS7 Sportback, which will rival the new BMW M5 and Mercedes E63 AMG. The new RS7 will boast over 600 horsepower from a 4.0-liter twin-turbo V8 shared with the Porsche Panamera, though some rumors have pointed towards a hybrid drivetrain borrowed from the Panamera Turbo S E-Hybrid.