This is probably the worst Sci-Fi movie I've seen in years... - Pity as it really had potential considering the Actors involved.
Above all, the story is totally insane!
Just ask yourself - why would a technologically superior race be a monarchy? Wakanda is a peaceful race, yet they have weapons that can easily obliterate the Earth. The whole society is deeply traditional that even their king can be challenged to a duel where he/she can be killed... Nothing, really nothing in this film makes sense.
This is one of those blockbusters you watch today, and tomorrow you will not remember a single good thing about it, so save your time and find a better movie to see.