God I spent way too long just emptying all of my ideas into a Wordpad Document and it just becomes an incomprehensible mess lol most of it doesn't really 'fit' GTA but ah well...
The basic idea for this GTA6 is to play around with timelines and decisions,taking the idea of the multi game storyline that links all of the 3D era games into 1 single release, Keep the 3 protagonist system but instead of all 3 being in the same place they all get their own time period to play in, the map stays the same but big changes happen depending on the Era your in and the decisions you made during them.
80's Vice City - Play as a Tommy Vercetti style character, your basic GTA/Scarface story, Rise up and take control of Vice City by any means necessary
late 90's/Millenium Vice City - Play as a CJ/Claude style character, Vice City has been almost destroyed by the actions of Tommy in the 80's, VC has become a hell hole filled with drugs and weapons and you have to survive in that street life and choose who to side with
Modern Vice City - Play as a completely new character type, an Undercover female cop, Vice City has recovered after the events of the 90's Era but Tommys kingdom still exists and needs to be destroyed from the inside
I'd love to see the idea of the Player Character of 1 era become the Mission Giver/main NPC of another and then the main villain of the last era, in 1 game.
Really there's a lot you could play around with in a system like that
