"Shooting of Wilson Yip's City with No Mercy, which promises even more explosive actions and more exciting storyline, has wrapped up in early March. The Chinese title gets a name change to¡¶µ¼»ðÏß¡·(Fuse/Flashpoint). To ensure that the action scenes stand out, Donnie Yen not only hired martial artists from around the globe but also invited Ngai Sing to join the cast. Reportedly, his duel with Ngai Sing will surpass the clash of baton and dagger between him and Wu Jing in SPL. Director Wilson Yip states that City with No Mercy is the best collaboration between him and Donnie Yen, "I dare guarantee that everyone who has seen this film will be shocked." City with No Mercy is being planned for July release and promotional video will be shown at upcoming Cannes Film Festival and Hong Kong Film Awards. The cast includes Donnie Yen, Louis Koo, Ray Lui, Shi Xing Yu, Fang Bing Bing, Xu Qing, Ngai Sing."
Source: http://www.wu-jing.org/News.php
Here's some behind-the-scenes footage:
http://www.youtube.com/watch?v=iwZIjrck-AY