Marvel comics revealed a shocking twist last month (May 25) whenCaptain America: Steve Rogers #1 went on sale.
It turns out Captain America isn't as heroic as we thought, as he actually supports the evil, former Nazi organisation Hydra.
In an interview with TIME, Marvel executive editor Tom Brevoort discussed the disturbing decision.
"It means on the most fundamental level that the most trusted hero in the Marvel universe is now secretly a deep-cover Hydra operative.
"That makes every interaction he has with anyone take on a second layer, a second meaning."
Brevoort went on to say that there should be "a feeling of horror or unsettledness" at the idea that someone like Captain America could be secretly part of an organisation like Hydra.
"There are perfectly normal people in the world who you would interact with on a professional level or personal level, and they seem like the salt of the earth, but then it turns out they have some horrible secret.
"You should feel uneasy about the fact that everything you know and love about Steve Rogers can be upended."
He went on to explain that the team spent a long time on the "compelling" story, adding: "It will make readers wonder how the heck we'll get out of this."