2) My thoughts on the final episode:
Walt needs to die. This show wouldn't have a satisfying end with him living happily ever after, and going to prison isn't final enough.
There needs to be some attempt at redemption. He's broken bad, so he may not actually get the redemption he wants. But he needs to try, just like he did when he called his wife on a recorded line, or tried to send money to Walter Jr. He wants revenge, sure, but killing the Nazis isn't a satisfying end to the story. He needs to believe he's helping his family.
There also needs to be a sense that his death was justice. If he loaded the guns into his trunk, but died of complications from his cancer before he could use them, it would be a pretty upsetting end to the story. He may have control over how he dies - like everyone seems to be suggesting with taking the ricin - but it has to feel like he had no other choice than to die.
There are two open ends - the weaponry he buys and the ricin. It seems all but impossible for the show to end without a grand fight with the Nazis, and they need to die. I mean, if they survived, it wouldn't complete Walt's arc as a bad guy, and it would feel like a loose end. There's no closure to their arc that ends with them alive. It seems like it needs to be violent and quick, and it almost certainly involves Walt trying to kill them with a machine gun. That could be a red herring, like the burnt pink teddy bear in the swimming pool, but with one episode left, it seems like a foregone conclusion that this fight is going to happen.
Lydia also needs something bad to happen to her, and we need to close the loop on these European buyers. Maybe they kill her, or maybe the Nazis kill her, or maybe Walt kills her with the ricin. But unlike some of the other characters who need to actually die to have their story end, the most satisfying answer for her may be to end up in cuffs. My guess, though, is that she lives, and ends up being the ultimate mistake, after Mike had her dead to rights and Jesse and Walt called him off. Four things that may pop up = her squeamishness about seeing violence despite wanting everyone killed, her kid, her love of chamomile tea that seems so ripe for a ricin'ing, and this strange arc with Todd being sweet on her also seems to need resolution.
We need closure on Walt's family. Marie sucks, and I don't care what happens to her. She's already played her part in screwing over Walt's family, and she got plenty of comeuppance after Hank called her and she rubbed the news in Skyler's face. If she isn't in the final episode, I would consider it a plus, but the most likely scenario to me is that we see her on the sidelines looking at the wreckage when this is all over. She seems like a likely candidate to parent Holly and Walter Jr if they are literally or figuratively orphaned.
Skyler's pretty screwed right now, but this show doesn't stop at pretty screwed. She could walk away unscathed, but that's not satisfying because she was complicit in the scheme and because Walt wants her to get away unscathed. Something bad needs to happen to her. She may be a sympathetic criminal but she's a criminal and she's something Walter White loves. She needs to be a victim and it needs to be grand. Skyler could die, or she could watch one or both of her kids die, but getting sent to prison wouldn't feel like closure and would be a pretty boring denouement.
Walter Jr. was one of the few innocent people in the show, and he doesn't deserve to die, but that doesn't mean he won't. He can't be made whole - he already refused the money, and it seems like a cop out if he ends up getting it once his father dies. There's very little you can do with his character that makes you feel good at the end. It's hard to imagine a scenario where he lives happily ever after. So I'm kind of leaning towards him either dying, or losing his innocence. I'm kind of thinking the latter - he gets involved in the bloodshed of the final episode when his family is threatened, or he somehow brings Walt down.
The same thing goes for Brock, or whatever his name is. The kid could survive all this, but he's a loose end, and it seems like they don't want any loose ends. What happens to him at the end? He could get killed, or he could get money and live happily ever after, or he could end up with Jesse Pinkman. I don't think he gets killed, but where he was just threatened by the nazis, he still plays a part of some kind.
Jesse had a deal with the feds. He might be able to walk away from this. They have a taped confession, and if it led to Walt's capture and conviction, then he could go free and live happily ever after with Brock. He's been beaten down so much, and tried to hard to stop the rollercoaster, that he may have earned his happy ending.
Here's my guess. Walt gets a message to Skyler that he is going to kill the nazis. He goes to their camp and a gunfight ensues. Walt is ill prepared for it, but to his surprise, he finds Jesse, who becomes his accomplice one last time. Together, they are losing to the Nazis, when the feds arrive and complicate the gunfight. Jesse has a chance to kill Walt, but turns him in instead. Todd escapes, and goes to talk to Lydia. Seeing that the Nazis are dead, Skyler tells the authorities about Lydia, which brings her down and shakes the European drug syndicate. Todd threatens to kill Holly, but against all odds, Walter Jr. kills Todd by running him over. Walt is taken into custody, but takes the ricin and dies before he goes to jail. Jesse is questioned about Walt's death after he had previously reported a ricin poisoning, but ultimately goes free for providing the evidence that got Walt convicted, and he lives happily ever after with Brock. The money is confiscated by the feds. Jesse's arc ends with redemption after starting bad, getting worse, and turning good. Skyler's arc ends with her life in shambles, and confusion about Walt's final act of selflessness. Walt's arc ends with him dying of his own actions instead of the cancer.