"Guerrilla Warfare," an exclusive poster created by Frank Kozik can be snatched up if you pre-order Rise of the Tomb Raider from GameStop. A handful of limited posters have been previously available only at promotional events. You can see them below. An additional poster is to be revealed closer to launch. Check out The Nerdist for more info.
"Tombs" by La Boca
"Woman VS Wild" by Geof Darrow
Source: Official Tomb Raider Blog