I don't think they will develop their own engine because Audi and Bentley are both owned by VAG. I think they will continue to either share, or both develop one together. Audi may not go back to Le Mans though - VAG may pull Audi out so Bentley could win next year as thay will generate more publicity. The Veyron should be ready to race a year later and they may overlap that programme with the Bentley one.