Why? Audi has a car in pretty much every range of Prices, from 14k to 200k, 4 door, 2 door, drop top, 5 door, suv etc, they already have a Big saloon car, the 6Series, now the 7Series smaller ones to, the 4Series.
I dont think Audi has the market to make another complete series, atleast not one thats bigger then the 8Series, They have pretty much got it covered, all they need know is a New 1Series and 2Series, and Maybe a COMPLETELY different kind o car called the 0Series.
not to mention the price of the 9Series, what the A9 base price being 95k?...-_- They have already got Competition from Bmw and Mercedes in all the Categorys, what would a bigger Saloon car be gutted towards?
No A9 Saloon should be, a Big A9 Coupe on the other hands...