Analysis Official Rockstar materials. No antagonist named

Who Is the GTA 6 Antagonist?

Nobody has been named. Two trailers, a full set of official character bios, and every screenshot Rockstar has released: no main villain anywhere in sight.

What the official material does show is that everyone around Jason and Lucia has an angle. Raul Bautista is recruiting for scores with other people's money on the line. Brian Heder collects his rent in favors. The music money around Vice City moves fast and quiet. And the heaviest pressure on screen so far wears a badge: bodycam footage, pursuits, and the prison system of Leonida.

Whoever ends up across the table from Jason and Lucia, Rockstar is keeping that card face down until launch.

Is Raul Bautista the villain? Speculation
The most popular theory, and it writes itself: Raul is a veteran bank robber pulling Jason and Lucia into bigger scores, and his official bio reads like a gambling ledger. Double down or pull your chips. GTA has a long history of the employer becoming the problem. Nothing official supports it yet.
Source: Fan theory. Official bio as only material
Do the trailers show an antagonist? Analysis
No named threat appears in either trailer. The opposition on screen is institutional: bodycam sequences, police pursuits, and Leonida's prison system. The factions of Vice City are shown running their business, not hunting the protagonists.
Source: Analysis. Rockstar Trailer 1 and Trailer 2
Has Rockstar ever named a villain before launch? Analysis
No. GTA 5's marketing never named its antagonists. Red Dead Redemption 2 kept its entire story arc sealed. Rockstar sells the world and the leads, and lets the enemies introduce themselves in-game. Expect the antagonist reveal to happen with a controller in your hands.
Source: Analysis. Precedent from prior Rockstar releases