A well-established hero has worked under their iconic persona for some time. They, like the audience, have simply assumed they're the first and only individual to work under this mantle.
That is until someone comes along and informs them otherwise. As it turns out, the hero is actually the latest in a long legacy of other individuals who've worked under the same mantle. It's only taken until now for the hero to discover this.
A subtrope of Retcon that has seen a lot of use in recent years. Not to be confused with Legacy Character, wherein this trope is invoked from the beginning.
Five hats means that five tropers think it is ready to publish.
You are saying that you think this draft is ready to be published. That means the description is not ambiguous,
it doesn't duplicate an existing trope, there are at least three examples, and the title makes sense.