After betraying the trust of his Justice League teammates after the events of the Tower of Babel, Batman discloses his secret identity prompted by Superman, who seizes the opportunity to reveal his own. The revelation surprises everyone, leading to a cascade of disclosures as each member unveils their hidden identities
Green Lantern Kyle Rayner even wondered out loud that he didn’t realize Superman never wore a mask.
Superman: My name…I’m really nervous…My name is Clark Kent. I’m a reporter for the daily planet.
Kyle Rayner: He doesn’t…wear a mask. I never even..thought he had a… day job…
Plastic Man: C.K.! I read your column!
Flash: You read the paper?
Plastic Man: No, I copy the funny pages with my hand. Yes I read the paper! In the words of Keanu…Whoa!
From – JLA #50
