“Superhero therapy” consists of densely-packed metaphorical content. The concept of “superhero” has a structure including having powers, facing challenges, having enemies, having a secret identity, and being valued. An individual story or character comes with specific metaphors. Some of these are particularly well-suited to mental health struggles. For example, J.K. Rowling intended her Dementors to represent depression. You fight them off by concentrating on a happy memory… and chocolate helps you resist their influence.