They had called Iron Man and Rocket Raccoon along because they were scientists who could discuss technical matters with Wakanda.
As for Vision and Wanda, it was because, in the original plot, both of them had died in Wakanda in Avengers: Infinity War.
Apocalypse had come purely out of curiosity, to see whether anything related to it would happen.
Three days later.
Apocalypse, Nick Fury, Iron Man, Rocket Raccoon, Vision, Wanda, and the others arrived on the African continent aboard a Helicarrier.
This was a state visit, so naturally they had to enter in the most formal and ceremonial manner.
Eastern Africa.
Wakanda's border.
Once they entered, the display showed a vast primitive grassland, with tribal people peacefully herding livestock.
It was very much in line with ordinary people's impression of Wakanda.
After crossing the border.
A miniature antigravity airship rose from the water's surface, came before the Helicarrier, and guided it forward.
At this sight, Nick Fury and Tony's expressions changed slightly.
Tony said, "Antigravity? I never expected to see my father's unfinished research here."
Apocalypse asked, "Didn't that aerial fortress in the Red Room use antigravity too?"
When he and Black Widow had taken down the Red Room before, Apocalypse had preserved the aerial fortress intact.
Iron Man and S.H.I.E.L.D.'s technical personnel had certainly conducted some research on it.
Iron Man said, "That technology is relatively outdated and difficult to miniaturize. The airship before us is only a few meters long and wide. Its antigravity technology is clearly quite mature."
Nick Fury said gravely, "Such an advanced nation exists on Earth, yet S.H.I.E.L.D. knew nothing about it? If it poses a threat to Earth, that would be a failure of my duty."
Only Rocket Raccoon, who came from the cosmic regions, found this level of technology unremarkable.
Apocalypse