I think that Harry is one of the Horcruxs, and he has to destroy part of him self. If you remember from the sixth, all the other Horcrux just got slitly damaged the ring had a crack and the diary had a hole, I believe that Lord Moldybutt didn't try to kill harry as a baby, and that is why he can't kill Harry. The were no witnesses to prove Vold did use the killing curse. And since Vold killed Harry's parents he had to sto his ripped soul somewhere, why not a baby with a prophecy. So Harry will have to hurt him self so badly that he will lose his power of being a wizard.
Now the funny one
As many of you have read there was a spoiler about Harry having sex with Ginny at the beginning, not true he has a foursome with Hermonie, Cho, and Ginny
Don't reply with the real answer I had to go out of town this weekend, so I missed the release since i ordered the book from Borders, I am having a friend pick it up foir me, but I can't read it till monday
This is not a real spoiler, just what i believe will happen