Rockstar doesn't leak anything; just wait for official information like any other normal person.
Apparently the Decermber issue of GameInformer will have GTA V as the cover story.
GTA V is supposed to take place in Los Santos.
Too bad it isn't the whole San Andreas area.
Yeah,
too bad. Oh wait, it's going to be all of Southern California; Los Santos, the countryside and surrounding areas. Then there is also the fact it is going to be huge since the series went through a reboot, so the large size will compensate for the lack of San Fierro and Las Venturas.