Gran Turismo PSP Will Unlikely Be Supported With Extra Content.

Sadly it's not looking likely as the producers likened DLC in the already 800-vehicle strong package as "throwing water into the ocean", which they describe as a "lifetime's worth of racing".

Some extra tracks would have been nice a bit further down the line, perhaps Polyphony will change their mind if the fans ask for it enough. We'll have to wait and see.