From GTPlanet Game Guides

News - 2/13/07

SCE France infromed them (jeuxvideo.fr) that Gran Tursimo 5 Prologue will come in autumn 2007, while GT5 will remain in 2008 margin - and they say "spring".

This is first ever semi-official mentioning of Gran Turismo 5 Prologue game ever - and it says "with more cars and tracks, and Online duels for the first time". Nice.

This page will be updated when more news arrives.