Each season there's been a big boss that Walt (i would say jesse too, but walt is the star) has to overcome.
this presents the big question who is going to be the big boss next season, my 3 guesses:
Hank: There's been a lot of tension already of Hank getting close. It would be a nice way to end the show of how far Walt will break bad if he has to kill his brother in law and possibly ruin his family in the process.
Jesse: The season finale is enough for people to assume there will be a big fight between them, again. Plus Jesse now having some killings under his belt he's a stone cold bad ass as much as Walt now.
Mike: Gus's main bodyguard. What happened to him, huh? They told way too much of his story to cut him off like that. He's 100% coming back as a character and you just have to wonder how important of a character he will be.
yes im a breaking bad nerd, best show on tv