Source:
CinescapeAccording to the scooper, a notice was sent to all book publishers that print J.K. Rowling's HARRY POTTER novels stating that "they needed to be prepared to print copies of the next HP book by no later than September 8, 2004." The source said that the title for the sixth POTTER book was not mentioned in the communication, just that the deadline would be in September and that "the artwork for the covers was going over final approval from the publisher and would be sent in August."
Rowling has stated that she is writing HARRY POTTER VI but has never once mentioned when it might be ready for publication. If this scoop is accurate, Rowling's publishers know of a tentative release date and are informing their printing/distriubution partners that it's coming soon. Here's a bit of additional speculation for you to consider: remember that Rowling's last book, HARRY POTTER AND THE ORDER OF THE PHOENIX, was released on June 21, 2003 -- the summer solstice. Could she be mulling a release of HARRY POTTER VI on the autumn equinox which falls on September 22 this year? It does seem possible if indeed the presses need to be printing copies of the novel by September 8 as our scooper told us.
Note: This is nothing but a rumor!