Flash 21 -

One of the most famous versions of The Flash #21 was published in 2017 as the second part of " The Button ". This storyline directly connected the world of the Flash to the mysterious Watchmen universe.

: The issue features a shocking confrontation with Eobard Thawne, the Reverse-Flash, whose mysterious death sets the stakes for a reality-shattering adventure. Flash 21

: The story offers tantalizing glimpses into Bart's origin in the 31st century. One of the most famous versions of The

In more recent stories (2025), The Flash #21 has explored even weirder cosmic horror. Flash 21

: In this timeline, Wally West has become a "war general," sending speedster copies of himself on suicide missions to defeat the villain Eclipso.