Flash | 21

In the 2013 New 52 continuity, The Flash #21 gave fans a long-awaited "race of the century" between Barry Allen and the impulsive teenager Bart Allen, also known as Kid Flash.

: It highlights the unique bond between Batman and Flash, grounded in their shared love for forensic science. When Barry Met Bart: The New 52 Flash 21

: The story offers tantalizing glimpses into Bart's origin in the 31st century. In the 2013 New 52 continuity, The Flash

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

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.