The Thunderbolts are a fictional superhero team appearing in Marvel Comics. Created by writer Kurt Busiek and artist Mark Bagley, they first appeared in The Incredible Hulk #449 in 1997. The team is known for featuring reformed villains who take on heroic roles, often under the leadership of Norman Osborn or Thunderbolt Ross. The original lineup included characters like Baron Zemo, Moonstone, and Songbird. Over the years, the team has undergone various changes, with different members and story arcs, exploring themes of redemption and morality. The Thunderbolts have appeared in multiple comic series and have gained a dedicated fanbase.