Steven Spielberg made his first trek to San Diego for Comic-Con this year. He was joined on a panel for The Adventures of TinTin: The Secret of the Unicorn by producer Peter Jackson, who flew in from the set of The Hobbit. Based on a popular European comic book franchise, the first of three TinTin movies will hit theaters this Christmas. There’s also a new video game from Ubisoft that will be out this fall in tandem with the live action/computer-generated film. Jackson and Spielberg talk about the new 3D movie in the video below.