70's blaxploitation in a city like Chicago or Harlem with a "Black Caesar" or "Shaft" like character rising up through the ranks. Give him a war veteran background like "Dead Presidents" and go from there.
If they want to stay with the rotation of 3 characters, copy "3 the Hard Way", where we can rotate between characters from the movie played by Jim Kelly, Fred Williamson and Jim Brown who come together to fight the "man", maybe replace one of the men with a "Foxy Brown" character...
The music in the game would be incredible, grab all the blaxploitation soundtracks from the 70's (Shaft, Superfly, The Mack) and add in the Hendrix, Pink Floyd, Led Zeppelin, Beatles, The Stones, etc.
If they want to stay with the rotation of 3 characters, copy "3 the Hard Way", where we can rotate between characters from the movie played by Jim Kelly, Fred Williamson and Jim Brown who come together to fight the "man", maybe replace one of the men with a "Foxy Brown" character...
The music in the game would be incredible, grab all the blaxploitation soundtracks from the 70's (Shaft, Superfly, The Mack) and add in the Hendrix, Pink Floyd, Led Zeppelin, Beatles, The Stones, etc.