* The Half-Blood Prince is not Mark, Tom Riddle, Voldemort or Harry.

*Arthur Weasley won't be the new Minister of Magic.

* Harry is a half-blood.

* Ginny's real name is Ginevra Weasley.

* By the ends of books 6 and 7 "you'll have all the back story you'll need", says JK Rowling, and a prequel will not be necessary.

* There will be a new Minister of Magic, no more Mr. Fudge.

* We will find out what happened to Hagrid's half brother Grawp. He will be a bit more controllable in book 6.

* The Dursleys are in the next book, but Harry's stay with them will be the shortest yet. In book 5 he stayed for 4 weeks, so we know his stay will be less than 4 weeks.

* Cho Chang will not be a romantic interest of Harry in Book 6, however Harry will be giving and receiving more kisses says JK.

* In books 6 and 7 we will find out exactly why JK killed off Sirius.

* Harry becomes even more powerful in book 6.

* In books 6 and 7 we will find out why Dumbledore trusts Snape.

* We will find out what happened to Wormtail aka Peter Pettigrew.

* More about the animosity between Snape and Sirius will be revealed in the last 2 books.

* JK has said that giving away the form of Snape's boggart and patronus says too much. We'll definitely find out what Snape's worst fear is, and it'll be important.

* Hermione and Draco will NOT end up together in book 6 or 7.

* We will find out what exactly Dudley saw when he looked at the dementors.

* The reason Voldemort and Harry both didn't die when Voldemort tried to kill Harry, will be revealed.

* We will see more of Draco's mother, Narcissa Malfoy, now that Lucius is busy.

* We'll learn more about Harry's scar in the last 2 books.

* Moaning Myrtle will make an appearance again, as will Tonks.

* More about Voldemort's birth will be revealed, thus helping us understand why he is so evil.

* Muggles begin to notice "more and more odd" occurrences in book 6, says JK.

* The wizarding world is really at war in the sixth book.

* Harry will tell his dearest friends about the prophecy after it sinks in to him.

* We will learn more about Harry's relatives, including his grandparents (though JK says they aren't really important to the story).

* We will find out what happened to Sirius's motorbike.

* Book 6 will be shorter than the 5th book (or at least JK's 99% sure, but will not swear on her children's lives) possibly because she said this about OotP when she was writing that book and that turned out to be huge.

* There will be no "new" nationalities of children at Hogwarts. Hogwarts is a British school, and JK says that adding foreigners for the sake of it is not in her plans.

* During an interview, when JKR was asked in which Hogwarts room she'd like to be for 1 hour, she said it would be a room in which Harry has been before, but doesn't know its importance. Yet. (this could have happened in book 5, but we're unsure).

* It's very important in the plot that Harry has his mother's eyes, and that her wand was very good for charms.

* The choice between what's right and what's easy will be a pillar of the plot in Harry's last 2 years at Hogwarts.

* Harry's parents' profession will be a big part of the plot.

* Something HUGE will be revealed about Lily Potter