The inevitable Tintin sequel is on the way, but the creators are all being a bit secret about it. Spielberg talked a bit and this is what he had to say.
In a quick chat with Totalfilm, Spielberg mentioned the regular things we expected like the fact that Peter Jackson will be directing it with himself producing. The biggest thing he said is that “We’re not telling the world what books we’re basing the second movie on yet."
A deal was made early on between Jackson and Spielberg that went along the lines of "I’ll direct the first one, you direct the second one." They are sticking to that plan and after Jackson finished filming The Hobbit he will go straight into the month of performance capture that will be needed.
While producer Kathleen Kennedy once said the story for the sequel would be based on The Calculus Affair, Spielberg denied that saying, “We haven’t decided that yet. She’s throwing a monkey wrench into your story! It could be that. I like The Calculus Affair. So it could be."
While he wont say which book they want to do, he did mention that “We have completed a story outline now. We have a writer on it. I’m just not declaring what it is. It will be more than one book, but no more than two.”