Brave New World director Julius Onah has revealed why Seth Rollins and the Serpent Society were cut from the movie, suggesting it came down to the team not fitting the story's

In the Marvel Comics universe, the Serpent Society is a mercenary group that carries out contracts for supervillains. They first appeared in Captain America #310 after Sidewinder (played by Giancarlo Esposito in Brave New World) formed a group out of the remains of the previous two Serpent Squads – a roster of snake-themed villains like Black Mamba,

Although the Leader is fighting Captain America in the MCU, he has a very long history as the Hulk's primary enemy.