ANN: "The official website for the anime films based on Gosho Aoyama's Detective Conan manga has confirmed that the 15th film, Detective Conan: Quarter of Silence, will open in Japan on April 16, 2011. The story begins with a threat against the Tokyo governor, but Conan's quick thinking prevents any fatalities when a subway tunnel is blown up. Conan learns there may be a connection to a village that was relocated for the construction of a dam, and he races to stop the criminal before the next attack.
The website is streaming a teaser trailer. (In the linked page, select the "Trailer 特報" button on the bottom.) The Detective Conan anime franchise is celebrating its 15th anniversary."