In regards to the Ozymandias poem, my first thoughts too were that the shattered statue/empire referred to Walter, but read a good review that made the case that while that could be true, it could also be referring to Gus (shattered visage/nothing left of the empire he built meticulously over 20 years) and Walter could just as well be the sculpter or traveller.
In regards to Hank, can't see how he can possible live through next episode. As many have noted, that last conversation with Marie telegraphs that's he going to die or the writers are just messing with the audience, which I don't think they'd do. This isn't Dexter, dammit. It would just be completely unbelievable. Once you start shooting at cops, you've gone past the point of no return.
Info/speculation on a couple of spoilery points. There's been a lot of speculation about who spray paints "Heisenberg" on Walt's wall, but as I posted earlier, the writers in a 'making of Blood Money opener' have said that it is never revealed. It's not important who wrote it, whether Marie (which come on, really?), neo-Nazi home invaders or some neighbourhood punk. The purpose is to show that Walter's secret identity is now completely blown, as evidenced by his neighbour Carol's reaction to him.
I don't know if the neo-Nazis take his money (at this point they don't know it's there and Walt has no incentive to tell them) or force Walt to cook, but I do agree the M60 is most likely for them and the ricin for Jesse or Lydia.
Definitely don't think the neo's take Walter to some New Hampshire branch. Feel fairly confident something forces Walt to use the 'vacuum repair' disappearer service, get a new identity, lay low in NH, then return a few months later to go on a suicide mission (which he may survive).
Cool, glad it's a prequel as I didn't like the idea that we'd know in advance that he couldn't die. I like Saul and if anyone could survive this mess, it's him, but don't want it to be in the bank.