Ace Attorney: Dual Destinies DLC Capcom recently confirmed for the west is missing one component from the Japanese version. Capcom Unity's Chris Antista took to the comments section of the DLC's announcement post to clarify that, while the case and costume content is confirmed, the 'quiz' DLC isn't coming to western versions because it "requires an in-depth knowledge of Japanese culture."
As Siliconera reports, the Japan-only content features a "deduction quiz" set at the Wright Anything Agency office, with three pieces of DLC dated for August 1, 8, and 15 priced ¥150 (around $1.50). Given the price, it seems a fairly insubstantial amount of content, although we're sure our in-depth investigations of Tokyo would make the quiz a cinch (coughonest).
As for the western versions, there are no further clues regards the price of the DLC that is coming. We suspect the matter will remain adjourned until a bit nearer the 3DS game's appearance on the eShop, scheduled for sometime later this year.