That could work. To me this new image says "Africa....America" very simply informative, functional, slightly reminiscent of caribbean flags due to color, but......it is not as symbolically, and historically evocative for me as the Sankofa with its uniquely colorful green to purple fade.
About the chains image, it's very very strong in evoking the steely cold inhumanity of slavery, but for most of the African American profiles I've created or worked on, it does not really fit them since they weren't slaves. They were free farmers, factory workers, entrepreneurs, washer women, domestics, soldiers, cooks, artists, etc.
So for me the chains are not universal enough, though could maybe work as a linked image for both enslaved and enslaving persons if the sub-project was into that.