AU in Miami, I'm back to posting S5 spoilers so don't read this post ha.
there is not stopping or quitting at that point.
I think the Czech's are addicted to the blue and when Walt says he is done, they are gonna be pissed and come after him
I was gonna say that if walt permanently wants out, he could just give everything over to Todd to be THE cook, but that'd still leave Lydia, Todd, the pest crew, and Todd's family knowing who he really is.
And as far as coming after him, maybe that has something to do with the opening scene in S5E1?
Hank may actually make Walt fess up and utilize Walt to take down the bigger players in action
Other than Lydia (and that's a strong MAYBE anyway) there aren't any bigger players. Gus is done. Cartel is done. Mike is done. Saul knows shite but he wasn't really a player in the meth game, he's just a crooked lawyer. Walt is Heisenberg, the man who Hank has wanted for over a year and is known to be THE kingpin in meth manufacture/distribution throughout the whole southwest. There's no way Walt talking will get him off scot free. He's still gotta face some extremely serious legal action if he talks, IMO.