'Secret Invasion': Is the Captain America who went back in time after 'Avengers: Endgame' a Skrull agent?
The way Captain America's (Chris Evans) story concluded at the end of 'Avengers: Endgame' is a point of contention with a lot of fans. Many believe that Captain America wouldn't abandon the fight and retire, not when there was a future that still needed saving. A lot of those fans have called Cap's decision wildly out of character and with rumors that Evans may be returning to the MCU at some point in the future, Cap's out-of-character decision might just be a clue for what's coming next.
While Evans' return is far from guaranteed, even just the rumors of it have inspired a large number of fan theories as to how he could return. Some wonder if he will be de-aged by a sentient cosmic cube, like he was in the comics, though that was responsible for turning Cap into an agent of Hydra much later down the line. Others wonder if an emergency will see someone go back in time to bring Steve Rogers back into the present. Superhero movies being what they are, Cap's return could be explained by any number of things, from cloning to reality-warping to magic, but one of Marvel's upcoming TV shows has some fans wondering: Is Captain America a Skrull?
Marvel's 'Secret Invasion' is one of the many shows announced on Disney's Investor's Day 2020, and will be a series that reveals that some of Earth's mightiest heroes have been replaced by Skrulls. It is a series meant to foster paranoia — the original tagline from the comic that inspired it was 'Who Do You Trust?' The shapeshifting Skrulls could be anyone and there's no telling how long a person has been replaced for.
Captain America could have been captured and replaced by a Skrull immediately after the final battle against Thanos (Josh Brolin), but not before that, as a Skrull agent would not have been able to lift Mjolnir. A Skrull agent replacing the leader of the Avengers is an excellent tactical move, even without taking time travel into account. The ability to go to the past, however, is the kind of advantage that any Skrull infiltrator could only dream of, especially given Steve's connection with Peggy Carter (Hayley Atwell), who would go on to co-found SHIELD. Going back to the past, a Skrull agent would have had decades to be able to destabilize Earth in preparation for the Skrull invasion.
This means that the original Captain America might still be kept captive somewhere in the present, while the old man Cap we saw at the end of 'Endgame' is simply the Skrull agent who aged himself and spent several decades getting Earth ready for an invasion. Meaning that Earth's heroes are in bigger trouble than they know.
There is no release date for 'Secret Invasion' yet.