Breaking Bad: Season 5 (spoilers)

First episode over. Thus begins the fifth and *allegedy* final season of Breaking Bad. We learned a number of things this episode:

•  Skyler is scared of Walt but willing to interact with him.
• Saul is a scared sleazeball
• Walt is in charge -- big time.
• Walt buys a huge automatic weapon (though we dont find out why...)
• Hank is putting pieces together regarding the Gustavo case -- as seen by his intense examination of the former meth lab
• Walt is unerringly intent on eliminating all evidence linking him to Gustavo

 These last two points are important. Hank will obsessively continue to dig into Gustavo's business. Walt will do anything to  avoid getting implicated. This season will take us down the road with this conflict as its center point.

How will Walt prevent Hank from figuring out his involvement in the business? Has he truly and irrevocably broke bad?