According to Okudaira, the reinforced rear wheel architecture needed to incorporate an AWD system has already been developed and will likely feature in a high-output diesel version for Europe.
The V6 version, which will run on gasoline, is most likely intended for the American market, and if given the go-ahead, will make its debut during the US-launch of the Corolla later this year.
Update: We've had lots of readers email in to ask about the above picture. No, it's not a new Toyota hot hatch design, just a design sketch of what the car could/should have looked like.