The actor tells The Independent he thinks he can unveil the casting news without "being thrown into Marvel prison", and admits he's stunned by the size of the film.

He says, "For the first few days I'll walk around like a little boy, just amazed by the megalomania of it. It's such a huge project. We could do 20 films with the budget."

Captain America: Civil War is scheduled for release in May, 2016.