According to such commentators or midrashim as say that Noah had slaves that joined him on the ark[1], what happened to them? That is: We hear a lot in the immediately succeeding chapters of Genesis (and of course in the rest of Tanach) about Noah's own descendants; did the slaves have any descendants? Did they remain slaves of Noah's descendants? Were any freed (or did any escape slavery)? Did any became separate peoples? Which?
[1] e.g., Haamek Davar to Genesis 7:1