The Secret Invasion storyline was a meticulously planned epic, the culmination of several years of narrative threads seeded by writer Brian Michael Bendis across multiple Marvel titles, primarily New Avengers. The core limited series, titled `Secret Invasion
`, ran for eight issues from June to December 2008. It was written by Bendis with pencils by Leinil Francis Yu, inks by Mark Morales, and colors by Laura Martin.
The event was born from a creative summit at Marvel Comics where the idea of a paranoid thriller was floated. Bendis pitched the concept of heroes being replaced by Skrulls, a callback to the classic `Kree-Skrull War` saga but on a much grander and more insidious scale. The central marketing tagline, “Who do you trust?”, became a cultural touchstone for the event, perfectly encapsulating the atmosphere of suspicion that permeated the Marvel Universe at the time. The reveal of Elektra as a Skrull imposter in `New Avengers
` #31 (June 2007) served as the primary catalyst, shocking readers and officially kicking off the prelude to the invasion. The event was supported by an enormous number of tie-in issues across nearly every ongoing Marvel series, making it one of the largest crossover events in the company's history.
The genesis of the comic book Secret Invasion is deeply rooted in Skrull history, religion, and a series of devastating setbacks for their empire. The Skrull throneworld, Tarnax IV, was consumed by the world-eater, `Galactus`, an event that shattered their civilization and scattered its survivors. This catastrophe coincided with a prophecy that foretold Earth was destined to become the Skrulls' new homeland. This religious fervor was weaponized by the newly crowned Empress Veranke. Veranke had been exiled for her fanatical interpretation of the prophecies but was brought back to lead her people after the destruction of their capital. She believed that the infiltration and conquest of Earth were a divine mandate. The Skrulls' plan was ingeniously long-term. They studied Earth's heroes and society for years, exploiting the chaos caused by events like `Avengers Disassembled`, `House of M`, and especially the superhero `Civil War`. This schism in the hero community created the perfect environment of mistrust for them to operate. Their methodology was terrifyingly effective. They developed a new generation of Skrull infiltrators who were undetectable by all known means—telepathy, magic, and even Wolverine's heightened senses. They abducted key figures from across the globe—heroes, villains, and government agents—and replaced them with these “sleeper agents.” These agents had the original's memories, powers, and even personality quirks, making them perfect duplicates. The plan was not just to fight Earth's heroes, but to dismantle their society from within, turning their own technology, organizations like S.H.I.E.L.D., and even their trust in each other against them. The invasion was the final, brutal step of a plan that had been in motion for years.
The MCU's version of Secret Invasion, depicted in the Disney+ series of the same name, presents a radically different origin. It is not a story of imperial conquest but one of broken promises and radicalized refugees. In the 1990s, as shown in the film `Captain Marvel`, Nick Fury and Carol Danvers encountered a group of Skrull refugees fleeing persecution from the Kree Empire. They promised to find these displaced Skrulls a new homeworld. For three decades, this promise went unfulfilled. While some Skrulls, like Talos, remained loyal to Fury and worked for him in exchange for sanctuary on Earth, a younger generation grew disillusioned and angry. Led by a charismatic and ruthless Skrull named Gravik, this splinter faction believed humans were unworthy of the planet and that the Skrulls should take it for themselves. Fury's disappearance during The Blip (after Thanos' snap) and his subsequent off-world station further fueled their resentment, making them feel abandoned. Gravik's faction began a series of terrorist-style attacks designed to push humanity's major powers into a world war, hoping to weaken the planet enough for a Skrull takeover. Their plan was not a mass military invasion but a campaign of political destabilization. They established a secretive settlement called New Skrullos in a decommissioned Russian nuclear plant and began a project to create Super-Skrulls by augmenting themselves with the DNA of various super-powered individuals, gathered by Skrulls who had secretly collected samples from major battles like the Battle of Earth. This version of the invasion is a direct consequence of Fury's actions and inaction, making the conflict deeply personal for him.
The comic event was a meticulously structured crescendo of paranoia and action.
The silent invasion began years before the main event. Key figures were systematically abducted and replaced.
^ Character Replaced ^ Powers/Role ^ Key Actions as Imposter ^
Black Bolt | King of the Inhumans | Remained silent, was a key part of the Skrull-run Illuminati, tried to convince the others to surrender. |
Elektra Natchios | Master Assassin | Led the Hand, was killed by Echo, revealing the Skrull plot to the New Avengers. Her death was the inciting incident. |
Spider-Woman (Jessica Drew) | S.H.I.E.L.D. Agent, Avenger | Became Empress Veranke herself. Manipulated events from within S.H.I.E.L.D. and the Avengers, playing both sides. |
Hank Pym (Yellowjacket) | Founding Avenger | Gave Janet van Dyne a new “growth formula” which was actually a biological weapon. Founded the Initiative's training camp. |
Captain Marvel (Mar-Vell) | Kree Hero | A specially-cloned Skrull agent designed to psychologically manipulate key heroes, particularly Noh-Varr. |
Edwin Jarvis | Avengers' Butler | Gained access to all of Stark's systems, implanting a virus that disabled Iron Man's tech and Stark Tower's defenses. |
Dum Dum Dugan | High-Ranking S.H.I.E.L.D. Agent | Replaced long before the invasion, giving the Skrulls top-level access to S.H.I.E.L.D. intelligence. |
Valentina Allegra de Fontaine | S.H.I.E.L.D. Agent | Tried to gain control of S.H.I.E.L.D. from within for the Skrulls. |
Brother Voodoo (Jericho Drumm) | Sorcerer Supreme Candidate | The Skrull imposter attempted to assassinate Doctor Strange to eliminate Earth's magical defenses. |
The consequences of Secret Invasion were seismic and redefined the Marvel Universe for years.
The MCU event is a more contained espionage story with a different set of stakes and outcomes.
Gravik's faction, feeling abandoned by Fury, begins a campaign of terror.
The MCU's aftermath is less about a change in power structure and more about a new global conflict.
The Earth-616 Secret Invasion was not a sudden event; it was the culmination of years of meticulously laid groundwork that left Earth's heroes vulnerable, divided, and exhausted.
This storyline saw the Scarlet Witch suffer a catastrophic mental breakdown, single-handedly destroying the Avengers. She killed several members, blew up Avengers Mansion, and shattered the team's morale. This act dissolved Earth's most powerful super-team, creating a power vacuum and a sense of instability that the Skrulls would later exploit.
Following her breakdown, a manipulated Scarlet Witch uttered the words “No more mutants,” instantly de-powering over 90% of the mutant population. This “M-Day” event crippled the `X-Men` and the entire mutant race, effectively removing one of the most powerful and numerous groups of superhuman defenders from the board. The Skrulls noted this massive reduction in Earth's defenses as a key factor in their invasion planning.
Arguably the most critical prelude, the superhero Civil War pitted hero against hero over the Superhuman Registration Act. The conflict, led by Iron Man on the pro-registration side and `Captain America` on the anti-registration side, created deep, bitter divisions within the hero community. It fractured lifelong friendships and destroyed the trust that had once been the bedrock of their alliances. This atmosphere of paranoia and infighting was the perfect soil for the Skrulls to plant their seeds of infiltration, as heroes were already conditioned to suspect one another.
The secret society of heroes known as the `Illuminati` (Iron Man, Mister Fantastic, Doctor Strange, Black Bolt, Namor, and Professor X) had previously traveled to the Skrull throneworld to issue a warning, but were captured and experimented on. This gave the Skrulls the biological data needed to bypass their defenses. Years later, when the New Avengers defeated the Hand, their leader Elektra was revealed to be a Skrull upon her death. This was the first, undeniable proof of the infiltration, confirming that the invasion had already begun.
The animated series presented a highly-acclaimed, multi-season adaptation of the Secret Invasion saga. In this version, the infiltration was revealed much earlier, with Captain America being replaced by a Skrull at the end of Season 1. The entire first half of Season 2 revolves around the team slowly realizing the extent of the infiltration, as Skrull agents replace S.H.I.E.L.D. personnel, government officials, and even heroes like Mockingbird. The storyline culminates in a global invasion and a massive battle, staying thematically true to the comics while streamlining the narrative for television.
A one-shot comic from the `What If...?` line explored alternate outcomes. One story asked, “What If the Secret Invasion Remained a Secret?” It depicted a world where the Skrulls won, successfully replacing most of Earth's heroes and leadership, creating a dystopian Skrull-run Earth disguised as a utopia. Another story explored “What if Norman Osborn's forces had lost the final battle?”, showing a scenario where Captain America's side retook control, preventing the Dark Reign but leading to a different set of consequences.
While the main plot of this video game focuses on the Civil War, the epilogue directly teases Secret Invasion. After the main story, Nick Fury is shown discovering Skrull infiltrators within S.H.I.E.L.D., stating that the Civil War was just a distraction and the real war is just beginning. This sets up a potential sequel that would have adapted the invasion storyline.