This is pure speculation, but what if there is a PS4 version of Gran Turismo 6 coming out, named the sport edition. Maybe it includes an official FIA Career, a handful of new cars and tracks and improved visuals. And it may finally include the long awaited Course Maker.
This would be a great idea. GT6 PS3 wouldn't have to be abandoned, as some of this work could trickle down into a Spec 2 update. It would have to be simplified a LOT, because the ram and Cell resources are much less than what PS4 offers, and GT6 is stressing the limits of what PS3 can deliver. A PS3 Course Maker 2 may only have a few more goodies than CM1. But they could code new single player GT Mode and Arcade Mode events out the wazoo. Hopefully some enhancements of Online Mode along with it.
But, if Kaz produced a GT6 Pro Edition for PS4, they could make some nice improvements without hurting work on GT7 very much. And I wish they would do something like this if work on a proper GT7 will take a while. Plus as I say, the PS3 is really looking old in comparison to what the new gen consoles and gaming PCs can do.
For instance, the GT7 engine is probably fairly mature. Port over the existing assets from GT6 and add a few new cars and tracks from GT7 work, as Enraged says, enough for some proper FIA style events in various classes. Include improved bot A.I. so the racing is fairly tight and competitive. While I'd like to see Race Mod included, this wouldn't be essential if PD would provide a good selection of race cars from every class of racing, and enough for
a proper field of cars in the same class. I can't stress this enough. I would like to see some kind of Livery Editor so we could customize and more importantly, personalize our cars. In fact, many features from GT7 could be ported in judiciously without hurting the appeal of GT7 itself. Course Maker, Event Maker, Livery Editor, Online Mode, Photo Mode and Movie Maker... even basic but improved versions of these would whet our appetites for the real next gen Gran Turismo. And I'm sure SONY is going to want a "killer app" racer to compete with Forza 6 and P CARS.
Some dreams can become reality.