WSJ has an interesting LEGO Movie article:
The film is computer-animated but made to look as if all the scenery is built out of real Lego pieces. Everything moves in a way that simulates the stop-motion films that thousands of Lego customers have created with their pieces and posted online.
"Any frame, if you stopped the movie, would be something you could recreate if you had a lot of money to buy a lot of Lego bricks," says co-director Christopher Miller.
Maybe just as interesting, if less candy-colored, is the story of how "The Lego Movie" came to be. Lego's pervasiveness is no secret: The company estimates that the world's children spend 5 billion hours a year playing with its toys and that, on average, every person on Earth owns 86 Lego bricks (many parents whose homes are littered with Lego pieces will acknowledge the allocation is wildly uneven.) The film, which opens Feb. 7 as the first Lego-related theatrical release, will show whether Lego can emerge from the shadow of Disney, DIS -0.83% Universal and Warner Bros. as a toy force in Hollywood.
Warner brought in co-directors Phil Lord and Christopher Miller, who had made "Cloudy with a Chance of Meatballs," to flesh out characters and a plot for the movie, which the studio is calling "family-friendly with an edge."
"Our fear going into it," Mr. Miller says, "was they were going to say, 'We wanna sell this toy and this toy. Kids love race cars, so we need to have a race car in the movie.' They never did anything like that. They said make the movie you want make. We'll make toys based on that."