Clark Gregg as Agent Phil Coulson
Clark Gregg as Agent Phil CoulsonInstagram / Agents of SHIELD

Last week, Marvel fans were pretty shaken up by the news that their beloved hero Captain America aka Steve Rogers is, and has been since he was a child, an undercover agent for Hydra.

Several fans and industry folks took to Twitter to talk about this big twist and how it affects Cap's long-running storyline. Imagine what one of Cap's biggest fans ever -- Phil Coulson -- must be going through.

Actor Clark Gregg (who played Agent Coulson in the Marvel Cinematic Universe and continues to do so in "Agents of Shield") recently posted a tweet addressed to "Steve Rogers: Captain America" writer Nick Spencer, showing his support (sort of) on the big twist.

"Steve Rogers: Captain America" writer Nick Spencer and Marvel editor Tom Brevoort are the people who introduced this major twist. "This is not a clone, not an imposter, not mind control, not someone else acting through Steve," Spencer told Entertainment Weekly. "This really is Steve Rogers, Captain America himself."

Rick Remender, the previous writer on Captain America, was planning a story in which Hydra infiltrated various institutions of government and superhero teams, but when Spencer took over, he simplified it to "one very valuable Hydra plant."

Spencer explained: "So I started asking, who's the worst person it could possibly be? It was really obvious straight away that there's nobody who could do more damage and nobody that could be a more valuable Hydra plant than Steve Rogers. That was really the genesis. It sprang pretty organically from story ideas that were already on the table."