I've seen episode summaries, I'm convinced I know what's gonna lead up to the ending, just not sure what the actual ending will be.
Jesse's guilt becomes too much, and he eventually snaps, forcing Walt to either kill him or pin the Heisenberg deal on him. Hank corners Walt to the point where he fakes his death, and Hank is satisfied even though he knows in his gut that Walt is still out there. Walter, wanting to raise be with his kids, decides to poison Hank with the ricen, when Ted shows up, threatening to blackmale Skyler is they don't give him more money. Skyler contacts Walt, who comes up with a plan to blame Ted for a crime that'll see him behind bars for good, he then poisons hank and frames ted for it. But before he gets poisoned Hank lets Jesse go, because he knows he isn't Heisenberg.
My guess is the ending is Jesse killing Walt, and confessing everything to the police.