200 pages!?!?! REALLY?!?!? I can't believe that it's only gonna be 200 pages! Hopefully, that will mean that the book will come out very soon. As for the HBP theories, since the book is so short the HBP is probably a character that has already been introduced, cuz Rowling doesn't have enough pages to make a whole new character. My guess is Tom Marvolo Riddle, Hagrid, Gryffindor, or Dumbledore. And I don't think it could be Justin Fletch-Finchery or Colin Creevey because they were attacked in the CoS which means they were mudblood, cuz no halfblood was attacked, and Rowling has ruled out all possible theories on Mark Evans.