Marvel Cinematic Universe (MCU) fans are well-acquainted with the tradition of theorizing and predicting plot twists and character arcs. One of the most enduring theories that has captivated audiences since the early days of the MCU was centered around the original Avengers and their potential secret sixth member, or hidden allegiances within the group. However, recent developments in the MCU’s sprawling narrative have officially put this beloved theory to rest.

The theory posited that among the original Avengers—Iron Man, Captain America, Thor, Black Widow, Hulk, and Hawkeye—there was more than meets the eye. Some believed that one of them could be a Skrull infiltrator, a theory bolstered by the ‘Secret Invasion’ comic storyline where many heroes were replaced by these shape-shifting aliens. Others hypothesized deeper connections to cosmic entities or predestined roles laid out by entities like the TVA as seen in “Loki.”

The crux of this theory often hinged on subtle cues in individual movies that suggested there were hidden layers to characters’ motivations or undisclosed aspects of their pasts that would have major implications for the future of the MCU.

As phases 3 and 4 of the MCU unfolded with blockbuster hits and critically acclaimed series on Disney+, each contributing to the intricate tapestry of interconnected stories, key revelations have systematically debunked the pillars holding up this theory. With character arcs reaching their conclusions, secrets revealed, and backstories thoroughly explored through prequels and origin stories, what was once fertile ground for speculation has been firmly established as known history.

The last nail in the coffin for this theory was perhaps wielded by “Avengers: Endgame,” which tied up many loose ends from over a decade’s worth of storytelling. Notably, it showcased resolutions for several OG Avengers that contradicted many speculative theories. The reveal of Skrulls in “Captain Marvel” also provided clarification on how they have been involved in Earth’s events without being mismatched to longstanding fan theories involving original team members.

While it’s always fun to speculate and dream up intricate webs of connections within such a dynamic universe, it appears that this particular avenue for fan theories has been conclusively closed off by careful narrative closure from Marvel Studios. However, even as one theory is put to rest, the constantly evolving nature of the MCU ensures that fans will never be short on material for new theories as we progress further into Phase 4 and beyond.

Ultimately, while fans may mourn the loss of what was at one point dubbed “the best original Avengers theory,” its debunking serves as a testament to Marvel’s storytelling prowess—keeping audiences guessing until they’re ready to reveal their secrets on their own terms. And as one mystery is solved, countless others arise—such is the allure of Marvel’s ever-expanding universe.