Board Thread:General Discussion/@comment-26417457-20181018205843/@comment-25430354-20181118085950

If a character returns to Death Battle, they should not fight the same opponent they did before (Goku vs Superman, Mario vs Sonic), and they should not fight someone from the same franchise as their previous opponent (Any of Batman's matches).

Ryu vs Jin and Shadow vs Mewtwo are good examples of follow-up matchups (regardless how you think the episodes turned out).