Rumors are, they're supposed to make Diagon Alley, including Olivanders. They will also have Gringotts, WITH A RIDE! Hopefully the cart ride, -fingers crossed
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AND.....
THE HOGWARTS EXPRESS (hopefully also an interactive 3D or 4D ride), THAT WILL TAKE YOU OVER TO HOGSMEAD AT ISLAND OF ADVENTURES!!!
Such great news for the potterfandom! I'm actually happy about Cali getting it, but with this expansion...I'M EVEN MORE HAPPY!