Season 5 Theories? Here's mine

Taking into account the new theory of Walt and Jesse's lab in the junkyard, I think that at some point in season 5, Saul, along with Skylar, is fearing for Walter's mental state/his own life. He goes to the DEA and for a good offer and police protection, tells them the location of the new lab. At the same time the Germans/Cartel are on their way to the junkyard to kill Walt and Jesse, they arrive at the same time as the DEA.

Now the magnet that is seen in the new poster would probably be used to lift a hatch/entrance to the lab, with Junkyard Joe operating it. Jesse leaves the lab in anger at something and gets caught in the crossfire between the DEA and the Germans/Cartel resulting in him being wounded and killed by Hank, Walt witnesses this through a small gap under the hatch. Junkyard Joe is also killed, leaving Walt trapped alone and scared in the lab.

Now there are two things that can happen here, either Walt can die in the lab from hunger or oxygen starvation, he'll die with his meth and take the secret of it's making to his grave. Or he escapes the lab, through some form of Deus Ex Machina (e.g. the DEA activate the magnet, find Walt and assume Pinkman kidnapped him).

Walt then spends the next few years (resulting in him looking like the flashforward Walt seen here) depressed about Jesse's death as they had started to form a father and son like bond.

He buys gun from the gun dealer, seen here, leaves his family with his remaining money and heads to the DEA office, where he gets Hank to talk to him privately in his car. They drive out to the desert where Walt and Jesse first cooked, puts on the Heisenberg hat and tells Hank his entire formula and why he did it, he then points the gun at a stunned Hank and asks him to finish it, Hank takes the gun from Walt puts it to Walt's head, before dropping it and crying. He then gets out the car and calls for police back up as he's going to take Walt into custody, before he can do so Walt gets out the car with the gun and put's it to his head shouting "No, I don't want my children to know" he then shoots Hank in the head, gets in the car and starts crying as the police arrive. He's arrested and the final shot shows Walt in prison as we slowly zoom in on his face and he gives out an unsettling smile.

I have some alternative theories, but I do think the junkyard will be the scene of a big shootout, what do you guys think?

Also I'm calling it now someone makes a breakfast joke