How do you know when you’ve hit it big?  Well, if selling millions of copies of books, grossing millions at the box office and selling millions more in licensed merchandise didn’t provide your first, second and third clue, the announcement of a planned theme park might be a pretty good indication.  We’re not talking a special ride at a theme park…we’re talking a complete theme park…20 acres worth. 

Universal unveiled plans in late May that a Harry Potter theme park will open inside Orlando’s Islands of Adventure theme park (which already houses Marvel Super Heroes and Dr Seuss islands).  The “Wizarding World…