We're going to go out on a limb and assume that Gran Turismo 5 XL Edition, a mysterious new version of GT5 that's recently turned up on Amazon, Neweggand Buy, isn't a DLC-packed Game of the Year-esque compilation re-release, but rather a literally extra-large version of the original. Bigger cars, bigger tracks, bigger disc, bigger box ... it probably even requires an extra-large PlayStation 3 to play it.
If you're a market analyst looking to make safe predictions, we guess you could infer that GT5 XL Edition is actually the stateside title for Japan's upcomingGran Turismo 5 Spec II rerelease, but we prefer living on the edge and thinking outside of the box -- until Polyphony Digital makes an official announcement, of course, at which point all knowledge of this post will be disavowed.