Any time a movie makes $77 million opening weekend, people are bound to start talking sequel; even if the movie is The Da Vinci Code.

That’s right, Sony Pictures is already looking for a way to follow up their adaptation of the controversial Dan Brown novel. Of course it would be pretty hard to actually make a Da Vinci Code 2, since the movie ends with things pretty well wrapped up. So Sony is looking at some of Dan Brown’s other work as a way to further financial prosperity.

Sony has told the New York Times that they next hope to bring Dan Brown’s “Angels and Demons” to the screen, a book some regard as even more controversial than “Da Vinci”. While the book doesn’t explore exactly the same subject, it does also center around Dr. Robert Langdon, allowing room for Tom Hanks to reprise his role as the rather stoic historian.

To get things moving, today Variety reports that Sony has hired Da Vinci Code screenwriter Akiva Goldsman to adapt Angels & Demons into a film. Though it's still pretty early, it seems their intention is to reunite everyone from Da Vinci and bring them back for another. They're already working on the movie's producing team of Brian Grazer and John Calley while Hanks and director Ron Howard will of course have first crack at returning to their roles on the project.

What’s “Angels and Demons” about? It’s Brown’s third novel (“Da Vinci” was his fourth), the story of Langdon’s brush with the Illuminati, and a frantic quest for the world’s most powerful energy source. Oddly enough, replace the Illuminati with shape-shifting robots and you also have the plot of the upcoming Michael Bay movie Transformers, also the story of a frantic quest for the world’s most powerful energy source: Energon. Don’t worry though, Langdon won’t end up driving a talking Volkswagen Beatle. He’ll get another beautiful babe to hang out with in the form of a brilliant Italian physicist whose father has been murdered. In “Da Vinci” it was a beautiful cryptologist whose grandfather was murdered. Brown finds a formula and sticks with it.

Unless people start rioting in the streets over “Angels and Demons”, it’s unlikely to make the kind of money Da Vinci Code did. But from Sony’s standpoint, at least some profit seems almost assured. Da Vinci Code hasn’t even been out a week, and it has already made more than $200 million worldwide, in spite of bans, protests, and outright condemnation.