So far little has been revealed about the plot for the upcoming Black Panther movie. Other than the casting announcements that help give a vague idea about where the movie might go, it is still ultimately a secret. This may be due to the fact that it's the Marvel Cinematic Universe film right before Avengers: Infinity War is released. But casting calls for Black Panther may help fill in some of the holes about where the film will go.
Looking at the casting, you may notice that they are casting for extras to fill out the CIA scenes: "CIA Agent Types with WEAPONS experience."
Black Panther has been described in the past as something of a international thriller. This makes sense considering that the main character is a new king of Wakanda, a nation that was pretty exclusionary before the events of Avengers: Age of Ultron and Captain America: Civil War. The CIA's goal is to collect, analyze, evaluate and disseminate foreign intelligence. It makes sense that all eyes will be on T'Challa and Wakanda following the events of the latter film.
Audiences have already met two key links to the CIA in previous films: Everett Ross and Sharon Carter.
Sharon Carter was introduced in Captain America: The Winter Soldier as a S.H.I.E.L.D. agent sent to spy on Steve Rogers a.k.a. Captain America. After the fall of S.H.I.E.L.D. in that movie, she moved over to work for the CIA. This is where we reconnect with her in Captain America: Civil War. In that movie we are also introduced to her boss, Everett Ross, who is in charge of the Joint Counter Terrorist Centre.
The two, however, could not be totally different from one another. Sharon is sympathetic to the superheroes while Ross is a bit more amoral towards them. He makes it clear that he doesn't like superheroes but he doesn't seem to go about it in a more passive aggressive way such as General Thaddeus "Thunderbolt" Ross (no relation).
T'Challa and Ross
Here's a deleted scene from Captain America: Civil War that shows a brief interaction between T'Challa and Ross:
Everett Ross was introduced in an issue of Ka-Zar before shifting into the newly launched Black Panther run in the late '90s. He was a POV character, as T'Challa/Black Panther was supposed to be mysterious, so the creative team knew they needed to have a cypher for audiences to understand what was going on. This was the point of Ross and he became more popular as the book continued.
It's worthy to note that Ross has had little to appearances outside of being connected to Black Panther. It was no coincidence that Black Panther and Everett Ross were introduced into the Marvel Cinematic Universe in the same movie.
Martin Freeman, the actor who plays Everett Ross, has yet to be formally announced for the movie. This might be due to the fact that his role will be minimum at best. It could also be that Marvel Studios does not have the need to formally announce it at the moment.
Either way we now know that the CIA will play a role in Black Panther. Will they be friendly or antagonistic towards the new King T'Challa? That's up in the air. But it will be fun to see.
It looks like the King of Wakanda will be a thorn in everyone's side.
Black Panther opens July 6, 2018.