: It highlights the unique bond between Batman and Flash, grounded in their shared love for forensic science. When Barry Met Bart: The New 52
: The story offers tantalizing glimpses into Bart's origin in the 31st century. 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. : It highlights the unique bond between Batman
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 In the world of DC Comics, "The Flash
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.
: Believing Kid Flash might be linked to a series of Speed Force murders, Barry chases the bratty teen across the globe.
In more recent stories (2025), The Flash #21 has explored even weirder cosmic horror.