Ok, I have been following this thread for the last 4 seasons and I am finally going to add something to it. Here is my take on what might happen.Every season there needs to be a "villain" of some sort. This season Walt's foil was Mike. I think that next season Todd's "family" ties come into play. I could see them trying to push Walt around after Todd has enough notes to think they can make the meth on their own. Anyone that has enough contacts to arrange the deaths of 9 people in prison are very scary individuals. I could see a situation where they threaten Walt's family and after Hank tells him he knows who Walt really is, Walt turns to him for help. He offers to turn state's evidence to help protect his family from the skinheads, nazis or whatever those guys are. Everything is fine for a while until a year from now, when they either catch up with Walt's family or Jesse and Walt is forced to come back, hence the machine gun.Just my 2 cents.