Flash 21 Info

: Barry Allen and Bruce Wayne team up to investigate a blood-stained smiley face button found in the Batcave.

In more recent stories (2025), The Flash #21 has explored even weirder cosmic horror. 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. : Barry Allen and Bruce Wayne team up

: The issue features a shocking confrontation with Eobard Thawne, the Reverse-Flash, whose mysterious death sets the stakes for a reality-shattering adventure. This storyline directly connected the world of the

: The issue focuses on the tension between Barry Allen, who believes speedsters shouldn't be soldiers, and a version of Wally that has been pushed to the edge. ⚡ Key Takeaways for Collectors The Flash #21 review - Too Dangerous For a Girl 2

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

In the world of DC Comics, "The Flash #21" has been the title of several major turning points across different eras. Whether you’re looking at the iconic "The Button" crossover or the first meeting between two generations of speedsters, these issues are legendary for redefining what it means to be the Fastest Man Alive. The Button: A Collision of Worlds