How odd. Because I saw plenty of foreshadowing. Here's a list. I'm not claiming all of these will pan out, but I'd be willing to bet some of them will:
--Buckbeak and Harry. They clearly have a strong bond, and with Sirius gone after OOP, methinks a certain Hippogriff will be making an appearance. I frankly wonder about Buckbeak snatching a bat out of the air as a snack. Vampires, I'd bet, would make good allies/servants of Voldemort...
--Ron and Hermione. Okay, no surprise there, but still.
--Hermione doesn't like to fly. I just think that's a clue to something.
--Hermione's reaction to Professor Lupin as a werewolf was to try and talk to him. I suspect there's something about Hermione and animals that will feature in the next books.
--Malfoy insisting he'll get Hermione back for punching him.
--Didn't anyone notice Malfoy had a new minion?
--Seamus wanting to ride the Firebolt.
--The Headless Hunt storming through the castle.
--Harry seeing something in the crystal ball. Keep in mind after OOP he now has
two teachers in Divination and has continued to take the class.
--Dumbedore's speech about dreams in the Great Hall.
--All those ravens all over the place. And we are beginning to learn more about the other Houses. I myself suspect I'd've ended up in Ravenclaw. Hmmmmm...
--I dunno why, but Ron's dream about spiders making him tapdance sticks out in my mind.
At least half of the above is utter rot, as likely as not. But I'd bet money there was a hint of something in there...
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