It can be destroyed by the rays that will be used on Carnage. Around him are many armored men with guns, flame throwers, etc. Spider-Man is also on hand. The mystery man tries to throw the briefcase into the rays and all heck breaks loose. The guys open fire on the cage and merely destroy it, letting Carnage loose.
Carnage gets the vial and the man and learns what it can do, and escapes.
The man is arrested, and when he grabs a gun and tries to escape during questioning, he is killed. Carnage plans his scheme.