Too obvious - I don't think there will be a standoff. I expect Hank is probably going to be dead before the last episode. This is after all the WW descent into hell and he's already nearly completely lost whatever soul he once had.
Ya know, I actually agree with you. I was visiting reddit's /r/breakingbad and they have a lot of amazing theories as far as the show goes. Hank is seriously one of my favorite characters though, so I would hate to see him go...
Remember the opening of this season with Walt sitting in the dinner then buying that gun out of the trunk of the car... I think that's going to be a scene from the last episode. Who's he going to blow away with that beast of a gun?