No. Rowling has confirmed that the 7th book will not be as long as the 5th book which is the longest in the series. I think it'll be around the same length as the 6th book.
I don't think Harry will die. But I think Ron or Hermione will die. Rowling has said in a couple interviews that at least 2 main characters will bite it in the 7th book. I just don't think it will be Harry.





