For future updates:
1) It would be great if you could manually cycle images for defeated enemies that got replaced by new opponents. Maybe add a similar interface as the one for active players, on the right edge of the screen too, so you can get this way up to 8 players available to display.
2) It would be cool if defeated enemies could be set to use their finales to "distract" active players.
3) You can win against all opponents but be unable to enable finales specific to those opponents that were cycled out. The worst offender is starting with Candy (Succubus) who gets replaced by Vivian, and then being unable to check their joined finale. There needs to be a way to swap out between defeated opponents.