
Christopher Markus (born January 2, 1970) and Stephen McFeely (born February 24, 1970) are American screenwriters and producers. McFeely and Markus were the second and the third most successful screenwriters of all time in terms of U.S. box office receipts with a shared total gross of over $3.1 billion. However, in overall, they are the highest grossing screenwriters altogether in terms of worldwide box office with the total gross of $9.3 billion. They gained worldwide recognition for their works that include The Chronicles of Narnia film franchise and the mega-shared universe franchise the Marvel Cinematic Universe, having written all three Captain America films (The First Avenger, The Winter Soldier and Civil War), in addition to Thor: The Dark World, Avengers: Infinity War and Avengers: Endgame, which is currently the second highest-grossing film of all time unadjusted for inflation. They also created ABC's Agent Carter TV series, set in the Marvel Cinematic Universe.

For generations, life on Earth-8 passed like it does on our world. Largely uneventful, and when problems did arise, they were handled easily by the world’s large population of super heroes. Until a day finally arrived like no other, and Earth-8’s strongest heroes were forced to unite against a common threat. The Retaliators were born! Not quite what you were expecting? Perhaps that’s the best way to describe this world, populated with heroes such as the patriotic power soldier known as American Crusader, the lightning-charged warrior god Wundajin, the massively-morphing, quick to anger monster known as the Behemoth and the scientifically-minded, elementally-powered foursome known as the Future Family. Alongside such figures as Machinehead, Ladybug, Stuntmaster and the “neo-human” heroes of the G-Men, they keep their world safe from threats like the destructive Lord Havok and the Extremists. On Earth-8, a life of heroism often comes at great sacrifice to the man or woman behind the mask. Faith in heroes is in short supply and mistrust can run rampant. Perhaps the people of Earth-8 should talk to some of their alternate world counterparts, who turn out in droves for movies featuring the very heroes they’re shunning.
