Here is what the trailer shows for sure and what fans are reading into it. Confirmed material includes the return to Vice City, the state of Leonida, Lucia as a protagonist, the Bonnie-and-Clyde framing with Jason, and multiple official environmental anchors. Fan-mapped notes are tagged as such until Rockstar publishes exact district names or map material.
Leonida Intel context
Rockstar hides a lot in its trailers, and this is a great catch.