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Had a fun idea:
A superhero comic which rather than telling you the hero's secret identity because it's- you know- a secret, we see like mabye three people who might be. None of them know eachother. We are never explicitly told that any of these people are the hero. They all have their own motivations and events that might or might not be what caused them to get powers and eventually use them as a superhero.
Perhaps the hero's (public only?) appearances are presented with dates but scenes with the "civilian identities" are not, so that without revealing who it is we avoid the problem of at least two people disapearing in a hurry right before the hero shows up and reappearing just after they finnished.