That 'black Superman' line feels like lame political pandering.
Like some fat money grubby slimy producer who doesn't sympathize with your political struggle at all just threw that in so he can get the black audience in there. Meanwhile naive saps (not saying they're naive saps BECAUSE they're black please don't misconstrued), think they bein repped by someone but really some white asshole in a suit wants your money.
More evidence of this is that they chose the biggest name non American black actor right now to appeal to black people internationally, not just the American ones.