Keith Olbermann has offered his speculated outcome of the Harry Potter series less than a month before the book comes out. No one is allowed to read the book early so Olbermann's speculation is just that.
He claims that Voldemort and Harry will come to blows and Harry will destroy all but 5 of the horcruxes of Voldemort. The location of Voldemort's last horcrux.......Harry's scar. Brilliant. The only way to get rid of it is for Harry to kill himself. Just as he is about to, Professor Snape comes out of the shadows and tells Harry there is another way. He can destroy the scar and survive but his magic will not. He will be a regular muggle. He will live (everyone's happy he didn't die), Voldemort will be history and everyone lives happily ever after. And come to find out, Snape's not such a bad guy; greasy yes, bad no.