Sightings of Modified Vehicles and Film Crews
Over recent weeks, observers have documented groups of exotic cars styled after GTA vehicles driving through Miami, often accompanied by camera operators. The vehicles display fictional manufacturer names from the series and have been photographed near locations already covered in Rockstar advertisements.
Context of the Vice City Campaign

Rockstar has already placed Vice City-themed billboards, flown a blimp overhead, and arranged a November Miami Heat game branded A Night in Vice City. Additional elements such as graffiti reading only Vice City and stadium signage have appeared without direct mention of the game.
Rumors of a Live-Action Trailer
Some fans believe the activity points to an upcoming real-life trailer that could debut around pre-install availability. Rockstar has not commented on the filming or the reported plans for branded beer products, leaving the purpose of the Miami shoots unconfirmed.