Between inbreeding wizards and a Muggle/Magical war that threatens to end the world, Harry is called on to once again be a Savior, just...on a grander scale this time. And damn those who came before who misinterpreted what "Master of Death" meant. As far as Harry's concerned, there will be HELL to pay when he gets back to Earth.
The champions for the Triwizard Tournament are going to be drawn on Halloween, so Harry just knows something is going to happen. Better to direct the explosion than be in its path, yes?