GT5 Prologue is one thing that I don't see as a big drag on the team. The car and track models were pretty much done for GT5. The artists whipped up some special liveries for the GT Edition tuners, the coders worked on some performance enhancements, the network team cobbled something together, a few programmers created some event generator code, wrapped it in a shell with a soundtrack player and there you are. Oh, and there was DLC for it too. That was probably two or three months work to build and test, and half of that might have been ironing out the online network stuff. And a Prologue that big really needed to be made, because the fans were getting pretty grouchy waiting so long for GT5. Surely you remember in 2009, even after having Prologue, how rowdy the boards were getting!
The Prologues are such a tradition in Japan, and the fans so ravenous for them around the world that they would import Japanese Playstations to play them on. I think a GT6 Prologue will be in such demand that one is likely, especially if Kaz goes all out on a PS4 game and includes a bunch of our wishes as well as his own. A GT6 loaded to the gills with goodies such as a Codemasters/Forza-like damage system might drag out the release date a while, not to mention trying to included as much Premium content and online functionality as fans demand. A Prologue will make the wait much easier. I would say that GT5 makes a Prologue unnecessary, but between many fans growing tired of GT5 and expectations for a new Prologue again, I think it's very likely. I'd love one, it'll most likely be another platinum seller just from pre-orders again, and it really shouldn't take too long to make.
