Why Are Bucky & Sam Fighting at the End of Thunderbolts*?

Wondering what caused the rift between Bucky Barnes and Sam Wilson in Thunderbolts*? The film’s final scenes and post-credits moment teased major tension between the longtime allies, hinting at deeper ideological differences and conflicting visions for the future of the Avengers. With one team embracing redemption and another rooted in legacy, the fallout could shape the MCU’s next phase.

Here’s what really drove them apart, and what it means moving forward.

Bucky and Sam Wilson’s rift at the end of Thunderbolts* explained

In the Thunderbolts* post-credits scene, Bucky Barnes reveals a falling out with Sam Wilson. The two are no longer aligned, and the rift centers around who holds the right to the “Avengers” name.

Bucky supports the Thunderbolts being rebranded as the New Avengers, while Sam is leading his own Avengers team composed of established heroes. The disagreement escalates when Sam files a lawsuit over the Avengers name, suggesting a legal dispute is underway.

Bucky’s support for the Thunderbolts stems from his belief in second chances. He trusts the team—Yelena, Ghost, Red Guardian, U.S. Agent, and Bob (Sentry)—and sees value in guiding them. He also expresses concern over Valentina’s manipulation and likely stays on the team to keep her and Bob in check. Bucky notes, “I didn’t have a choice who I worked for,” comparing his past under Hydra to Mel’s free-willed allegiance to Valentina.

In contrast, Sam’s version of the Avengers appears rooted in legacy and public trust. As the officially recognized Captain America, Sam had been working with the U.S. government on a formal Avengers relaunch. His rumored lineup includes Wong, Shang-Chi, Ant-Man, and possibly Captain Marvel, Hulk, or Shuri.

The Thunderbolts’ press conference blindsides the team when Valentina names them the New Avengers, undermining Sam’s official efforts. Yelena whispers to Valentina, “We own you now,” signaling the team’s growing awareness of her tactics. Meanwhile, Red Guardian jokes about renaming the team “Avengerz” to avoid legal issues.

This rivalry sets the stage for a deeper conflict in Avengers: Doomsday, where both factions—Sam’s traditional Avengers and Bucky’s rebranded Thunderbolts—may clash over ideology, leadership, and the meaning of redemption.