A thread posted by someone purporting to have information on GTA VI from insider sources has gained a lot of attention on Reddit. The post goes into great detail about the locations, development and story arc of the sequel to GTA VI, with the game being set across three cities and decades. Fake? Likely. It makes for great reading though.
https://www.notebookcheck.net/GTA-VI-Project-Americas-codename-next-gen-exclusive-and-a-return-to-Vice-City-with-a-Narcos-twist.426816.0.html