Thunderbolts is an American comic book series published by Marvel Comics, created by writer Kurt Busiek and artist Mark Bagley. The series debuted in 1997 with a now-iconic twist: a new team of superheroes emerged to fill the void left by the Avengers and the Fantastic Four after the Onslaught event, only to be revealed at the end of the first issue as the Masters of Evil in disguise. Led by Baron Zemo in the guise of Citizen V, the team included characters like Goliath, Beetle, Moonstone, Fixer, and Screaming Mimi, all adopting new heroic personas.
The central premise of the series revolves around villains seeking redemption, or at least attempting to navigate life as heroes, often struggling with their own criminal natures and the suspicion of the public and other heroes. Over the years, the team's roster and leadership have changed dramatically, with characters like Hawkeye taking over and attempting to genuinely reform the group. The series has explored themes of identity, morality, and whether people can truly change.
Subsequent volumes and iterations of the team have taken different forms, from Norman Osborn's government-sanctioned hit squad during the Dark Reign era to a team of reformed super-criminals working for the government under the leadership of characters like Luke Cage and the Winter Soldier. The Thunderbolts have become a staple of the Marvel Universe, representing the complex gray area between heroism and villainy.