Is Mark Ruffalo in Captain America 4? Well, the actor seemed to accidentally confirm he'd be appearing in the upcoming fourquel, but that has been swiftly debunked.
At the Santa Barbara International Film Festival, an exchange played out that seemed to suggest Ruffalo would have a role in the next Captain America movie. When asked, "You have Captain America: Brave New World, that's next, right?" Ruffalo responded with: "Yeah." Then, when coaxed to say something about the film, he said, "It's gonna be great."
