They could really do all they wanted just to make a link between Gringotts and the rest of the Wizarding World, but visitors and tourists would begin to think that the park is turning into "The Harry Potter Park." Universal should be known for its diverse theming and attractions, which is my main gripe with having a detached Phase II for Potter. If Universal did decide to proceed with Phase II, it'd be best to place it in the same region of the park, rather than to extend it into other parts. The Studio Tour is one of USH's most prestigious attractions of all time, and forcing it back just to accomodate a popular franchise wouldn't be the smartest move for Universal.