The Walking Dead season 3 poster is now out, with Rick Grimes standing on a bus pointing his gun. In the background you can see the prison, with “A Block”, towers and the fence.

The artwork features Rick Grimes (Andrew Lincoln) standing atop an overturned bus in front of a prison. In an uncertain world, the survivors must not only fight the dead, but also face a whole new fear: the living.
Source: AMCtv.com