How about seeing who can guess the outcome of the final book? No cheating before you have read it please!
My Harry Potter predictions for book seven (Deathly Hallows):

Lupin and Tonks – both killed by Death Eaters.
Arthur, Percy and Bill Weasley all killed by Death Eaters.
Professor Trelawney emerges as a vicious spy and Death Eater.
Hagrid lives, is allowed to do magic again, but has to leave Hogwarts.
Professor McGonagall lives but retires from Hogwarts.
Harry Potter Survives, but is stripped of all magic powers. He ends up with either Ginny Weasley or Luna Lovegood, who also has an important role.
Lucius Malfoy is killed by Ron Weasley.
Draco Malfoy is either killed by Voldemort, or he survives.
Hermione does her usual heroics and ends up with Ron Weasley.
Ginny Weasley saves Harry Potter's life.
Nevile Longbottom kills Bellatrix Lestrange.
Let's hear your predictions!
See you when I get back from Hogwarts...