DISCLAIMER: I DIDN'T READ ANY SPOILERS & DON'T KNOW ANYTHING PAST LAST NIGHT'S PREMIERE
This is just a theory, but I re-watched Season 5 before last night's episode (like I'm sure many of you did). In the seventh episode, there are two allusions to suicide. The first is during the raid of Mike's place. During the raid, Mike is watching a program that mentions cops killing themselves. As the quote runs on Mike's television, the camera zooms in a bit on Hank. The second allusion is a lot more blatant. It occurs during Walt's visit to Hank's office. Hank leaves to get coffee, looks at his co-worker & makes a gesture that suggests suicide. Now could these both be stabs in the dark? Of course. But, given the show's history of foreshadowing, I get the feeling that Hank is gonna kill himself.