Here's the Black Panther Easter egg you missed in Avengers: Age of Ultron

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Aug 27, 2015, 5:00 PM EDT

Marvel Studios movies, as we know by now, are filled with easter eggs great and small: Whether it's finding Captain America's broken shield in Tony Stark's lab in Iron Man 2 or hearing the name Stephen Strange uttered briefly in Captain America: The Winter Soldier, every Marvel film that comes along plants references and details that have diehard fans nodding their heads in recognition or delight. 

So, while everyone is waiting to see Black Panther make his screen debut in next May's Captain America: Civil War, it turns out that the first official mention of the Panther in the Marvel Cinematic Universe was part of a don't-blink-or-you'll-miss-it shot in Avengers: Age of Ultron.

Those same diehard fans know that the character of Ulysses Klaue (Andy Serkis), introduced in Age of Ultron, is a major nemesis of the Panther, and his single scene in Age of Ultron was widely perceived as a setup for the eventual Black Panther movie. But Slashfilm reports that a fan has discovered an easter egg that directly references the Panther, himself, and spells out the history of animosity between Klaue and the Wakandan ruler.

In Avengers: Age of Ultron, we get a very brief glimpse of a file on Klaue, but thanks to the magic of high-quality screengrabs, an MCU fanpage was able to capture the image:

The page's owners were also able to transcribe the text, which reads:

Ulysses Klaue was an assassin hired to take down T’Chaka at the Bilderberg conference in the case that he refused to negotiate Wakanda’s resources including Vibranium. But, Klaue was also there personally, as the Panther killed his great-grandfather in the 19th century while this one was trying to annex Wakanda. He was paid ten million dollars for the kill.

T'Chaka is the father of the current Black Panther, T'Challa, and was the Panther himself until his death at the hands of Klaue (named Klaw in the comics) right in front of his son. That leads T'Challa to attack the villain himself, and although Klaue/Klaw gets away, he loses his right hand (which he actually loses to Ultron in the movie).

It's suspected that we will see some version of the death of T'Chaka in the Black Panther movie that's due out in 2018, and we will meet his son for the first time just over eight months from now. But thanks to this little image, we have some sense of the story to come. Who knows what other little surprises may be planted in Avengers: Age of Ultron? I'll be combing through my Blu-ray for sure now.