Neither Shakespeare nor his contemporaries appear to have addressed black superiority in any societal sense. Shakespeare used many races in his plays, with their ethnic identification used to drive chracterization.
The Drake Jewel shows the profile of a Moor, eclipsing the profile of a white woman, symbolizing white Europe. There are about seventy of this specific cameo and to me they symbolize Black superiority. Othello, The Moor of Venice shows a Moor as having the highest social rank in Venice: a noble, a christian and coming from a line of royal men. He symbolises nobility and is a person as well. What we today perceive as racist remarks are really jibes against the nobility by people who belong to the trading, middling classes. After all, how anti-Black could the Venetians be if they made a Black Man their highest military leader? If they hated him as a Black man, he would have been lynched for eloping with Desdemona.