SMALL THEORIES
Once Harry kills Voldemort his scar will disappear.
In the Bible, there's references to the 7th son of a 7th son being special. This was refering to King David, the one who killed Goliath. Now, Ginny is the 7th child in her family, so she might be special too even though she's a girl! (I wonder what she'd do to become special!)
Snape will be the one to kill Voldemort.
Maybe Arabella and Mrs. Figg aren't the same person at all! Arabella might be old Mrs. Figg's witch daughter. There could even be a romantic link between her and Sirius. He might have left a girl behind when he was taken to Azkaban. I mean if James had Lily, then it's very likely that Sirius was dating someone as well. Arabella possibly???
The "glint in Dumbledores eye" is because Harry was used to revive Voldemort. Since Voldemort used Harry, he could touch him because some of Lily Potter's love for Harry, which protected him from being killed as a baby, was transfered to Voldemort. And that means Voldemort now has love in him which will bring him to his downfall.
Sirius will get a girlfriend.
At the end of Book 4 we see Wormtail's severed hand replaced by one that is made of silver. Silver is a metal that can kill werewolves. Seeing as Lupin is a werewolf, Peter might try to kill him.
The Dursley's will be killed by Death Eaters, perhaps by Mr. Malfoy...
Crookshanks is a cat and Mrs. Figg has/had alot of cats. Could it possible that Mrs. Figg gave it to the pet store? There could be a connection in there somewhere...
Hermione will be seriously hurt.
Someone in Book 5 or later will become an animagus after being tempted by You-Know-Who during detention.
There was a *look of triumph* in Dumbledores eyes because Peter Pettigrew was supposed to do more than just get some blood from Harry, but he didn't because he owed Harry his life. Remember Dumbledore said that there may come the day when Harry would be glad he spared Pettigrew's life because Voldemort now has a servant in debt to him.
Moaning Myrtle will become a house ghost after she saves a depressed student!
Here's another veiw on Voldemort. When he used Harrys blood to resarect himself it made it so Harry could touch and kill him. That would explain the look of triumph on Dumbledore's face.
(Just a side note from me on this one. In Book IV, You-Know-Who DID touch Harry's face and survive. Unless he can't touch Harry for long periods of time...)
Harry and Dudley are going to fight ove a muggle girl and that is why Rowling said not yet when asked if Harry ever used magic on Dudley.
Harry's aunt will be the one using magic late in life. It would explain her insane lust to be normal.
When Voldenmort was reborn, he used Harry's blood AND Peter's blood (a.k.a. flesh). Peter has a life debt to Harry, and such things, just as Lilly's love, run throught wizards blood. So, Voldemort has now the same debt to Harry as Peter. That is what Dumbledore meant when he told Harry he will one day be happy he saved Peter's life. This also explains the "look of thriumph". Dumbledore had.
Snape will die trying to save Harry Potter from You-Know-Who even though he really hates him. He is really just a nice person and looks out for Harry.
Is a goblin animagus. Because Sirius implies in Book III that he is the smartest of his kind. So he is not human. But you have to be human or goblin to get into Gringotts.
Harry Potter is going to be longer than seven books.
Snape was in love with Lily Evans (Harry's mother), so one of the reasons why he hated James Potter so much was because he married Lily and had Harry.
Snape will be the death-eater that dies. Voldemort probably discovered that Snape was the spy when he inhabited Quirell's body in the first book. Voldemort also seemingly knows everything thats going on.
Snape will die trying to save harry, thus repaying the debt to Harry's father and leaving the readers thinking, "He really wasnt so bad".
The title of Book VI will be Pyramids of Furmate or Achemist's Cell.
If Voldemort was the Heir of Slytherin and Harry is the Heir of Griffindor and Voldemort uses Harry's blood to remake his body...Does that mean that instead of Slytherin's genes in him, Voldemort now has Griffindor's. That could be why Dumbledore was so happy at the end of Book 4.
Since You-Know-Who drank unicorn blood, something unexpected might happen to him later and prevent him from killing someone. It said that whoever drinks unicorn blood will have a cursed life.
In book VII it won't be Harry that kills Voldemort it will be Neville Longbottom as revenge for the unfortunate happenings to his mother and father.
There's something important about Privet Drive. It must be a safe-haven... otherwise, Dumbledore would have wanted Harry to stay at Hogwarts during the Summer holidays.
The tile of Book VII will be Chariots of Light.
Lily Potter’s claim to fame is the same reason she and her husband were killed and the same reason Harry keeps coming back to Privet Drive every summer. She must have discovered or concocted some sort of magical object (like the Sorcerer’s Stone) that gives immortality or magical protection or is a power source and whatever it is, it is now hidden in Privet Drive. I think it is the later though because Harry has to come close to it every year (to recharge) but does not necessarily have to stay the whole summer.
The Harry Potter-Lord Voldemort saga will culminate in an explosive duel that will end in a mystery if both of them died (like Sherlock Holmes and Professor Moriarty falling off of the cliff or bridge). Harry probably won't grow old because it is a ho-hum end to a storied life (even if he becomes an auror or minister of magic). He would probably disappear in a blaze of magical glory and speculation of his death or otherwise would abound.
Ron and Hermione would end up together and would write chronicles of Harry’s life and make a lot of "gold" off it. Then they would befall the same fate as James and Lily. They would have a son named Harry and the whole thing will start all over again. (HP is so profitable who wouldn't think twice about selling out?)
(NOTE: J.K. Rowling has said in all of her interviews that she will stop writing after seven books. The only extra thing she might do is an encyclopedia about the magical world. I'm kinda hoping she'll write a biography of her characters, though. I'd love to know about Dumbledore's past (like how he defeated the dark wizard Grindelwald), Sirius' and Lupin's childhood, and that sort of thing.)
Dumbledore's look of triumph can mean only one thing: he has gone over to the other side.
Susan Bones will make a big appearnce. Hagrid mentions the Bones in Book One, and in the movie Susan Bones is the only one called up to the Sorting Hat that was not in Gryffindor or Slytherin. Maybe Rowling told Columbus to put her in.
Harry will become an Auror just like the fake "Mad-Eye Moody" said.
Snape returns to You-Know-Who as a spy, but is ratted on by Karkaroff. Voldemort then kills Snape because he's a spy.
When Harry is in the maze during the fourth book, he's bitten by a spider. So if voldemort takes blood from harry, it has spider venom in it. Could it be that Voldemort will be weakened by it? Especially with the Basilisk-Arachnid connection?
Because of Percy's loyalty to Mr. Crouch and the Ministry of Magic, he will turn on his family and kill one of them. I don't think it will be Ginny, Ron or Mrs. Weasley, but it very well could be Mr. Weasley.
Draco will somehow see fit to join Dumbledore and the others in the fight against Lord Voldemort. He just seems to have the personality of having to make that sort of choice, then he will fight for the good side and then will die for the cause.
The only way Voldermort will die is that if the other true heirs of the founders of Hogwarts fight against him, and they probably are: Harry Potter (Gryffindor), Cho Chang (Ravenclaw), Susan Bones (Hufflepuff).
The lack of the Sorcerer's Stone hasn't killed Nicholas Flamel yet, its possible that he could replace Dumbledore or have some other place in the remaining books. He seems important enough to have more meaning in the series.
Harry will end up using magic on Dudley to save him from something or someone rather than to harm him.
Obviously, killing You-Know-Who's body is not enough to stop him because of the immortality spells he's used, so his soul must be destroyed. The only way to permanently end him is with the Dementor's Kiss.
In book VI, Harry and Ron will fly a Winged Horse to Godrics Hollow and find Godric Gryffindor's Diary, which will reveal how to destroy the most powerful of Dark Wizards and Witches.
You-Know-Who uses Harry's blood to reserect himself in Book 4. This means that Voldemort will kill Harry, but die as well because they're both bound to each other now.
Professor Snape was the person who alerted Dumbledore about Voldemort's plans to murder Lily and James. In the end, however, they both died, so Snape still felt James' debt was not repayed. That's why he went to such great lengths to protect Harry in Sorcerer's Stone.
We will see the return of Norbert the Norwegian Ridgeback. This will occur when Harry and the Weasley family go to visit Charlie in Romania. Could Norbert play a vital role in the defeat of the Dark Lord?
Snape is *not* going to spy on Voldermort. His job will have something to do with Azkaban and the Dementors.
(I'm skeptical about this because Lily was a witch born to muggle parents. Snape was in Slytherin and would have bought into that whole Pure-blood thing, right?)
(Or maybe she was just lucky enough to have her father be the director of the film!)