Jackie Chan and Donnie Yen together?!

Smoly crap! How did I never know of this before? Jackie Chan and Donnie Yen in the same film?! That's insane.

I'm gonna go try to watch this somewhere...anywhere!

Quick question: have the two of them played in any other movies together?

(PS: I'm hoping Stallone can get Yen and Chan together along with Li in the Expendables 3. How freaking epic would that be?!)