I gotta agree. Walt is done. What constitutes "done" is open to interpretation though.
Hank definitely has the brains to end Walt. Hank had Gus shook and this was a man who was 100x more poised and methodical than Walt ever was.
The sole saving grace Walt has concerning Hank, is it would be career suicide to arrest him. So he has to tread carefully.
Jesse? Outright going against Walt probably not. But Jesse has been a liability for pretty much the entire series, so him playing a role (either directly or indirectly) in Walt's downfall is a given IMO.
Then there's Lydia, Declan, the Nazis, and Walt's family. You might be like
"his family?" but Bryan Cranston brought up a good point in that New York TimesTalk interview last night. He basically said, would dying be the ultimate L? What if Walt lived, and his entire family died? Wouldn't that be a far worse L, considering it would destroy his self-delusion that he did all this for them?
Lastly, like @
phillycavsfan mentioned, the poem "Ozymandias". It's also the name of the 14th ep. That can't be a coincidence. That's probably the ep, like "Crawlspace" (and they even used the same music) where shyt falls apart.
Fred.