So far we've gotten: LA, New York, Miami, and kinda Las Vegas and San Francisco.
But I struggle to think of any others.
Chicago is a cool city, don't get me wrong, but aesthetically it's kinda boring for a video game setting. I think Boston is too old to set a game where driving in a major mechanic, who wants to drive through those streets? Not Bostonians based on the ones I've met. And DC, nah fuck that!
Only ones I could maybe think of are New Orleans and Philadelphia. Honestly GTA Pittsburgh would be a risky but potentially interesting choice.
Idk, anyone want to play GTA Cincinnati?
The ENTIRE countries of Mexico, Colombia and Brazil? Shit Rockstar is gonna be busy.
They did San Andreas so something like that but more ambitious and GTA 7 worthy.
Cdmx + northern MX + southern MX (oaxaca?)
Colombia obviously Bogota + Medellin + Cali
Brazil could maybe be just Rio.