Reign of the Supermen #457: The Masked Man of Steel
Adam Talking Superman on Twitter: "@MayorSnart Oh interesting so you think the masked figures standing with everybody represent the dead? I assumed they were people who were once residents" / Twitter
Even Superman and Superboy Wear Masks In DC Art
Superman Puts On A Mask, But Not For The Reason Fans Expect
Jurgens Unmasks the Masked Superman of "New 52: Futures End"
Action Comics #372 DC Pub 1969 the Masked Superman ! | eBay
The New 52: Futures End #17 Review - Major Spoilers
Superman's apocalyptic villain finally revealed by DC Comics - Polygon
Batman V Superman Masked Menace Wall Art | Digital Art
SPOILERS] Any other theories to the 'Masked Superman'? : r/DCcomics
Arrowverse Posters 2021: Superman, The Flash & More CW Heroes In Masks | TVLine