Black Panther was the first Marvel film, and perhaps the first superhero film, that really tackled the topic of racism head-on. Yes, Erik Killmonger (Michael B. Jordan) is a murderous villain, but he does make a good point about Wakanda's neutrality when black people around the world were facing slavery, persecution, and death. Even so, he's one of the first MCU villains to actually change the hero's mind and by the end of the movie, T'Challa (Chadwick Boseman) decides to open his country up to the rest of the world.
According to Samuel L. Jackson, however, S.H.I.E.L.D. leader Nick Fury probably knew about the technologically advanced nation prior to the events of Black Panther. While hosting the actor on her talk show, Ellen DeGeneres voiced her surprise that he wasn't in the film.
“I couldn’t [believe it] either,” he said. “When they were making it, I kept saying, ‘So when do I go to Wakanda?’ And they were [shakes head no].”
He even tried to secure a cameo of Fury simply walking in Wakanda, just to let the audience know he was privy to them the entire time.
“Can I just walk down the street in Wakanda so they know that I know it’s there? Because I know it’s there. I mean, Nick Fury knows every black thing that’s on the planet, so he’s gotta know about Wakanda," said Jackson. "I wish I had been there, but I'm really really, really, really pleased with the success of that film and how it worked out. And eventually...I may end up in Wakanda."
Last we saw of Fury, he was crumbling into a pile of dust alongside Maria Hill (Cobie Smulders) after Thanos snapped his all-powerful fingers in Avengers: Infinity War. Right before he was erased from existence, he sent out a distress beacon to none other than Carol Danvers, aka Captain Marvel.