US GT5 Prologue to include extra content?

According to reports, the North American release of Gran Turismo 5 Prologue is to feature additional content not found in the Japanese version of the popular racing sim.

News comes following a report on website Siliconera, which was able to squeeze the information out of a Sony Computer Entertainment (SCEA) PR representative.

However, despite committing to new content for the US release, no details were available as to what this may include; although, the inclusion of extra vehicles and tracks certainly seems a possibility.

Gran Turismo 5 Prologue is scheduled for release in North America on April 17, with a European release due slightly earlier on March 28.