Official swiss importer AMAG slipped into a press release today that Audi will unveil at the Geneva car show in march 2012 a new 450hp V8 4.2 FSI S-tronic Quattro RS4 Avant. Basically the drive train of the RS5 into an RS4. Press release available here: Asphalte.ch • Afficher le sujet - Audi RS4 (B8)

So this cust through speculation that it would:
- use the new 4.0 twin turbo
- be canned as a project (Car and Driver)