I wonder if this movie will accurately portray African slavery
Africans engaged in slavery for centuries before Europeans arrived. They fought among themselves, captured slaves and sold them to Europeans. Judging from the trailer local Africans are just good guys fighting evil Europeans. The movie also seems to vastly exaggerate the affluence of local African kingdoms in terms of how developed they were.
At pone point in the trailer the woman says "Europeans want to conquer whole of Africa". The ironic thing is that locals at that time didn't have the awareness of the concept of Africa.