Both, Gibson Amphitheatre AND Curious George will make way for it:
Source:Universal Studios in Hollywood will raze the 41-year-old Gibson Amphitheatre to make way for its coming Harry Potter attraction, the Wizarding World of Harry Potter. Like the Wizarding World in Orlando, the Hollywood Harry Potter will be a theme park based on J.K. Rowling's "Harry Potter" books and the films made from them.
Also slated to fall under the advancing march of the boy wizard is Universal's Adventures of Curious George. The playland's current features include a 500-gallon water dump and flying foam balls.
http://www.latimes.com/features/books/jacketcopy/la-et-jc-harry-potter-flattens-gibson-amphitheatre-curious-george-20130424,0,5512194.story