GTA VI, according to a report by Kotaku, is still at the beginning of its development and will not be a chapter particularly extended to the launch.
Jason Schreier, author of the report, would have confirmed that to avoid situations of working crunch as already happened for the previous works, Rockstar would be developing the new game without excessive stress, probably to face the controversy raised by the employees, forced to exhausting shifts during the development of Red Dead Redemption 2.
Also according to Jason, Grand Theft Auto VI would be a title of modest size at launch, but extended later through updates. It is also specified that it would still be a game with large dimensions, but not comparable to those of the aforementioned Red Dead Redemption 2. A continuous update program will probably be followed as has already happened with GTA Online, making it in all respects a live service.
What do you think of these rumors, does a constantly updated GTA attract you or would you prefer a vast and complete title already at launch?