'Prisoners of the Sun' was a very, very early discussion, and it isn't under discussion anymore," she said. "We've still got Anthony Horowitz working on the second movie, and we don't know what we're doing with the third movie yet."
The first film incorporates several Tintin stories -- "Secret of the Unicorn," "Red Rackham's Treasure," and "The Crab with the Golden Claws" -- which established the main characters. "We knew that we needed to introduce Tintin, we needed to introduce the relationship with Haddock, we knew [the dog] Snowy was going to be in it," Kennedy said, "so now what we're thinking [for the second film] is what new characters do we want to introduce? Well, we'll probably introduce Calculus and bring him into the fold."
As in Professor Calculus, who was introduced in "Red Rackham's Treasure" as far as the original stories are concerned, but didn't appear in the film. Calculus is a romantic, hearing-impaired scientist who invents a mini submarine as well as a rocket that can go to the moon. He also drives Haddock crazy when he uses unscientific methods that end up working. Since the main story of "Red Rackham's Treasure" is already featured in the first film, one of the other stories to look to that features him heavily is "The Calculus Affair," in which the eccentric inventor is kidnapped.
"We haven't decided yet," Kennedy cautioned about the story, "but that's the direction we're headed."