According to Box Office Mojo Harry Potter and the Prisoner of Azkaban has smashed opening day records in the United Kingdom. The movie has grossed a massive $9.2m (£5.03m) for its opening day, which was the biggest opening day and single day of all time.
According to Box Office Mojo:
Its predecessor's had nowhere near that amount of money on their official opening days. The Sorcerer's (Philosopher's) Stone opened on November 16, 2001 and grossed $3.9m (£2.1m) from 505 screens while The Chamber of Secrets grossed $3.99m (£2.18m) from 522 sites on its first day on November 15, 2002.
Also, the Weekend Warrior from Comingsoon.net is predicting that the movie will earn $93m for it's opening weekend, which would be better than the previous two movies. The article also discusses the problems that some movies have encountered when they are third movie in a franchise (threequel).
According to the warrior:
Look for Harry Potter and the Prisoner of Azkaban to set a new record for the month and take back some of the ground it lost to other movies in the last year and a half.
Despite the amount of big movies already in theatres, Harry Potter and the Prisoner of Azkaban will do slightly better than the previous movies in its opening weekend and significantly better than the last chapter over the course of the summer. As one of the most anticipated movies of the year, one shouldn’t be surprised if it becomes the third blockbuster in a row, earning over $90 million opening weekend on its way to $300 million or more.