I remember listening to the commentary on Kentucky Fried Movie, and they were joking that Joi demanded that it state in her contract that if the producers ever made Cleopatra Schwartz that she would reprise the role. They all were joking about her insistence, but it was likely a smart move. Who knows, people might have raved about the trailer so much that they might have made it? She does a great Pam Grier impersonation in it too. Her fighting, while maybe not up to great standards, was more than passable for 1977, and that was much of Pam Grier's claim to fame. Frankly, with all the satiric Blaxploitation and films like The Hebrew Hammer these days, I am surprised no one has made it. Here is the clip from KFM.
See Black Samurai @ TV4U (poor quality, but free with no commercial breaks)