Scenario: All the pollution and new chemicals have caused the world extreme health problems. Everybody is sick or already dying. Doctors and scientists are working around the clock to find a solution. New discoveries and experiments in medicine have led to a deadly outcome. While trying to create an universal serum that can cure any disease, scientists have stumbled across an alien substance that has the ability to attack the sick cells in a body and eradicate them. A cure is created but the doctors then find out that the alien substance heals its host only to take control of it later and slowly devour it. Even worse, it makes its host spread it to other people so it can mutate. And now it has escaped the laboratory ....
Tony Stark + Iron Man suit
The virus causes mayhem. Governments are collapsing, cities are burning, people are killing each other for the fear of being infected. Tony Stark is trying to save the innocent while also funding research to find a cure for the virus. He has build several bunkers in which uninfected people are kept safe. Iron Man goes around helping the ones in need and trying to build a safe haven in which mankind could continue to live on, healthy, without pollution. Impulsive, he takes no precautions for himself, or the Iron Man suit...
Fox Mulder + Dana Scully
While Tony Stark is all over the world trying to save as many people as he can, Scully is working in the lab to try and find a way to kill the alien virus. But what can kill an alien virus? Mulder thinks the answer lies in Antarctica, inside an ancient spacecraft which crashed on Earth millions of years ago. He embarks on this dangerous path to find an answer that could save mankind, but will he find it, and even so, will he do it on time?
Mulder manages to find a way to destroy the alien virus, but, by the time he returns, Tony Stark is already infected. Scully designs a new serum, one that makes the alien virus leave the body of its host and die. They administer the serum to Tony Stark, but he succumbs to the damage that the virus has already done. He dies as a hero, having also created the safe haven for humanity.