The 7th book **spoiler alert**
Kanais
Harry will be attempting to find and destroy Voldemort's remaining
Horcruxes
Harry will return to the Dursleys' during the school vacation, but the
magical protection Dumbledore arranged will expire on his 17th birthday
when he comes of age
Harry will visit Godric's hollow
The last word is expected to be "scar," but may change
We will find out something "incredibly important" about Lily Potter
We will find out who R.A.B. is
We will discover more about Dumbledore's past
There will be no more Quidditch
We will discover where Snape's loyalties lie. In an interview, Jo said:
Question: There's an important kind of redemptive pattern to Snape.
JKR: He, um, there's so much I wish I could say to you, and I can't
because it would ruin. I promise you, whoever asked that question, can
I just say to you that I'm slightly stunned that you've said that
and you'll find out why I'm so stunned if you read Book 7. That's
all I'm going to say.
Something will be revealed about Petunia Dursley, although it will not
be that she is a Squib
We will discover the reason for Sirius' death, and see a reappearance
of the two-way mirror
Viktor Krum will return (World Book Day, 2004 interview)
We will see a reappearance of Dolores Umbridge - "It's too much fun to
torture her not to have another little bit more before I finish."
(MuggleNet/Leaky Interview)
We will see the wedding of Fleur and Bill Weasley
We will finally learn the full reason why some people become ghosts
when they die and others don't
Any others? Or just rumors that are unconfirmed as of now..