Earlier this year a Sony Exec casually ran off a list of games coming to the PS3 this year and within this was "Gran Turismo 6" which got sites rushing and communities excited about a new GT coming before the end of this century.
Now a little bit of what could be something, or it could be nothing but nevertheless it's certainly something new and could be another clue to the whole GT6 PS3 tale that's sweeping the rumour mills. :D
http://uk.ign.com/articles/2013/04/16/retailer-lists-gran-turismo-6-for-playstation-3