Marvel Studios employed extensive secrecy protocols to protect Chris Evans's surprise return as Steve Rogers in the upcoming Avengers: Doomsday film. During public appearances, Evans disclosed that production documents, scripts, and on-set communications all referred to his character by an alternate identity—the name of an unrelated Marvel hero—to prevent unauthorised information from spreading if materials fell into external hands.

The revelation retrospectively clarifies a puzzling detail from previous production leaks, where observers noted references to a property styled as a 1960s home connected to that same codename. Rather than indicating the actual character's involvement, the references pertained to Rogers's residence within the film's narrative. Evans additionally hinted at substantial character challenges ahead, noting that directors the Russos maintain their creative tradition of subjecting the superhero to severe trials that test his resilience and moral fortitude.