After 2 whole years they will release the movie. I hope the waiting will be worth it, since Seagal's role is merely minor. I can guess the cover of the DVD: Seagals name on top with his face dominating the picture, below him a smoking gun, cards with mug shots of the other actors, including a bullet hole.
I don't see a reason why not Mason. I can imagine a later release, maybe December 2014. Even if he Seagal is "not popular", he is still an American citizen and even that Hollywood ditched Seagal out, the US are remaining the country with the most fans, second only to Eastern Europe and Russia.