It's quite clear to us that Gran Turismo 5 creative director Kazunori Yamauchi knows way more about cars than we do. Take, for instance, this latest making-of video discovered by GT Planet (embedded after the break), where he gets down to the nitty gritty on the inclusion of Mercedes' 2011 SLS AMG in his game. Before he delves into the possibility of the car appearing on the game's cover, he's shown with co-workers handling a box with three disc cases -- one blue, one red, one black. Though he makes it clear over the course of the clip that this isn't the final packaging, he doesn't exactly spell out what these mysterious cases might hold. Millions of cars? Top Gear episodes? Micro Machines?! Our best guess is that it's a Collector's Edition of some sort, though we'd love for such a thing to include a miniature SLS AMG (just sayin'!).

Getting back to the SLS AMG, Yamauchi says that the to-be-released car is in the running for a starring role on the game's cover. "The foremost reason is that the SLS AMG will probably be the most exciting car in the world when Gran Turismo 5 is released ... Also, in terms of styling and driving performance as well, it's probably the hottest car around right now," Yamauchi teases. We've asked Sony for details on the mysterious three-case box and will update this post when we hear more.

Update: Sony has responded by declining to comment. And now we play "The Waiting Game."

[Thanks, Sean]