They posted a new tweeted image! The background as it appears on the Rockstar site. Close up on the silhouette. Sawn off shotgun on the right, duel wielding pistols second from right, lever action rifle middle. Last but one on the right the hat looks a little more like a Mexican sombrero maybe? Far right is definitely a bandanna or scarf of some sort rather than hat which would be a none cowboy character most likely.