captain america the winter soldiers script was based on a story from the 60s
mackie was hesitant about the series because he felt it would not be able to match the quality of the mcu films and he did not want a black actor to be the lead of marvels first failure but he was won over by spellmans writing
 premise six months after being handed the mantle of captain america at the end of avengers endgame 2019 sam wilson teams up with bucky barnes on a global mission to stop an antipatriotism group the flag smashers who are enhanced with a recreation of the super soldier serum and believe the world was better during the blip