Chiwetel is too light-skinned. I don't want to see him play a Wakandan. Michael B. Jordan is already pushing it.
Maybe Killmonger has an American mother in this one, idk.
Wakanda is an isolated nation, so I hope they give the people a consistent look with Chadwick/Lupita as the gold-standard.
Oyelowo would work very well; depends on if they have a big enough role left for him.
You do know Real Africans come in a range of shades right?