After it took in more than $250 million at the box office—approximately the cost of six officially-licensed Star Wars Lego kits—the makers of The Lego Movie are moving forward with more computer-animated adventures based on the line of toys. Along with a sequel planned for 2017, Warner Bros. has announced that they are also working on a spin-off film based on the discontinued line of ninja Legos. Ninjago, which features Lego characters that also star in a Cartoon Network series, is set for a fall, 2016 release …