5. Hank Will Arrest Him
Probably one of the most likely outcomes of this show, however because it is the most likely, it probably means in Breaking Bad land that this won't actually be what happens. And if this does happen, it won't be easy. Season 5's opener, set a year from the events that happen in Season 5 show Walter purchase a M60 machine gun. This seems to be an obvious hint that a large confrontation is about to go down, very possibly with the DEA and Hank leading the charge, especially considering that now, at least we can assume, Hank knows everything about Walter's dark secrets. That said, a machine gun battle between lots of DEA officers and Walter doesn't quite seem to fit the mood of the show... although massively epic events have happened in the past that don't quite fit in either (the plane crash in Season 2 for example). Added to this the fact that Walter's best friend (who doesn't know about his meth business) is arguably Hank, and Walter has gone to great lengths to protect him before, it doesn't seem likely that he'd want to machine gun him to death. The same can be said for Hank. So maybe a bloody confrontation between the two isn't exactly in the cards... although I wouldn't rule Walter out of killing Hank at this point to save his skin as his last test before he is now the unsympathetic villain of the show. Even if it doesn't end in a bloody battle, it is still fairly likely that Hank will be forced to arrest Walter, and Walter will be shown having to spend much of his life (probably the rest of his life... or maybe even sentenced to death) in a maximum security prison. It is very, very rare that a show will present a highly immoral character and allow that character to get away with all his crimes by the shows end, so it is almost safe to say that Vince Gilligan will want to express the message to the audience that in the end crime doesn't pay. It certainly seems like that has been pretty much the general message so far, and Walter spending life in prison will be a perfect way to express this message. Also, this possibility will mean that Walter could return for a film (though difficult) and the audience won't have to suffer watching his death on screen. It is also very likely that Walter may in fact turn himself in to Hank at the end. This way the audience could at least feel some level of sympathy for the character, and it may be a nice way to end the show. But, if this is the case, then why was Walter buying a machine gun and apparently apart from his family in the season 5 opener?