TBH i dont think there is any room for improvement and need to add any more cars. i mean what else is there to add. we already got 3 Race Prepped cars based off of 3 street cars. not to mention 4 different open wheel based cars.
i think scawen and the cars that we have now will be here forever never to be replaced and joined by any new ones. At least in another couple of years.
if you think about it, i bet the team sees all the DDS editing and figures that we dont need new cars if we keep editing them to death to the point where they are completely different looking animals.
the only changes i see coming regarding cars would probabally be performance based. no need for rally cars and such when you can just mess with your setups and slap on your "Castrol Rally" skin that makes your XRT look like a Celica...