Continuation of the Rogues Gallery list from yesterday....
6) Found Foes: You have an exploratory nature or something else that leads you to foreign countries or fantastic realms where you inevitably upset someone's evil plans and get them to swear vengeance on you. Their powers could be anything, and are likely quite potent. (Example: the Fantastic Four vs. Namor, Anhillius, Psych-Man, the Skrulls, Mole Man)
7) Neighborhood Watch: The old neighborhood (or country, or planet) hit everyone in different ways. Your foes are those who grew up in the same circumstances you did - perhaps with the same teacher - but turned out different. Their powers are likely similar to yours in the main.
8) Common Element: Your foes all share one common element - all animal based, all have mutated heads, all based on classic elements, all monster-related, all from children's stories, all madness - that makes them visually/stylistically similar but doesn't say anything about their motives or themes.
8.1) Animals: Spider Man vs. Doctor Octopus, Vulture, Scorpion, Lizard, Rhino
8.2) Facial Deformities: Dick Tracy vs. the Blank, Flattop Jones, Pruneface, Rughead and countless others (Plus see Detective Double, earlier in this blog)
8.3) Elements: based on air, water, earth, fire, wood, metal and perhaps storms?
8.4) Madness: Batman vs Joker, Catwoman, Mad Hatter, Poison Ivy, Clayface and lots of others.
8.5) Monsters: thematic versions of Vampires, Werewolves, Mummies, Re-animated men, ghosts, etc.
In any event the intent is for players to get a card that gives them inspiration for who their character is based on who they fight. I'm not sure how well it would work in practice but I'd love to hear ideas.