Highly unlikely rj...ie if you go by the massive investment by Ford Aust. only very recently in the development and introduction on the new Cyote S/C V8's...
The FWD 4 potters will most likely replace atmo IL6's initially and then even probably the IL6T.
I believe death will eventually come to all petrol and possibly diesel powered cars as we know them beginning with the introduction of 'proper' electric vehicles soon like the Volt and Telsa which cover both ends of the price point spectrum ATM but will continue to grow with much more variety in future.