From Professor Trelawney and her prophecy to Regulus Black and his discovery of Voldemort's plans for Slytherin's locket, these characters were all part of Harry Potter's overarching story.

Later in "Harry Potter and the Order of the Phoenix ... Dumbledore also knew about the prophecy that Professor Trelawney foretold long before Harry ever came to Hogwarts. He knew that in order ...

The first instance of Trelawney's warning coming to fruition can be traced to a gathering in Harry Potter and the Prisoner of ...