Discussion Main / SuperheroPrevalenceStages

Would a linking to tropes like the differing shades of Morality be pertinent? Like the following:

• Early Stage: Black-and-White Morality - specially in the Golden Age: Nazis and mobsters are evil; heroes are clear cut and patriotic.
• Late-Middle Stage or Late Stage per se: Grey-and-Gray Morality - for the Bronze Age of Comic Books (roughly since the 1970s, in real time); villains get development into their psyche in order to make them less of sterotypes, while heroes begin to be painted in a more fallible light, in order to kick them off their pedestal.

Might I suggest a fourth stage?

Götterdämmerung: The world's superheroes and villains are all killed or forced into hiding all at once. This may serve to set the stage for a new generation or just the set-up for "retired" supers to return.

Examples:

• The Decimation in the Marvel Comics depowered the majority of the world's mutants, though after "Avengers vs X-Men" a new wave of mutants suddenly gained powers.
• In Watchmen the Keene Act outlawed superheroes and, with the exceptions of the government-sanctioned Comedian and Dr. Manhattan, and the wanted criminal Rorschach, retired from crimefighting.
• In The Incredibles a wave of lawsuits led to the super relocation program where supers hung up their capes and assumed completely civilian lives. It later turns out that Syndrome killed off most of the retired supers.
• Base Raiders takes place after an event called "Ragnarok" where all the world's superheroes and villains all just disappeared in an 18-hour period. Now there's a thriving black market in superpower-granting artifacts looted from their abandoned bases.

Can someone please help me moving the remaining examples from the YKTTW? I am not familiar with most works there.... :(