Some info slashfilm rounded up:
You’ll be able to buy a butterbeer, which looks just like a real beer with the froth on top, but it’ll be non-alcoholic. J.K. Rowling was at a butterbeer tasting and loved it. Steve Jayson, executive chef with Universal Parks and Resorts said, ‘The flavor of this is great, real comforting, nice and smooth going down - and you get a mustache.’
The Flight of the Hippogriff ride (family friendly coaster) will center around The Care of Magical Creatures Class. Hagrid will give instructions on how to properly behave and approach a hippogriff. You’ll need to keep eye contact, bow and it will bow back. Then you can get on the ride.
Hogwart’s Castle will feature the queue to the Harry Potter and the Forbidden Journey ride. The queue will feature a lot of moving portraits and will take you by or through the Defense of the Dark Arts room, the Common Room and the Great Hall.
Also, a new video from The Half-Blood Prince DVD