: 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 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 Flash 21
: Barry Allen and Bruce Wayne team up to investigate a blood-stained smiley face button found in the Batcave. : The issue features a shocking confrontation with
: This issue is widely praised for the dynamic, kinetic artwork of Francis Manapul, who used massive splash pages to capture the feeling of super-speed. The Modern "Army of Flashes" : This issue is widely praised for the
: It highlights the unique bond between Batman and Flash, grounded in their shared love for forensic science. When Barry Met Bart: The New 52
In more recent stories (2025), The Flash #21 has explored even weirder cosmic horror.
: The story offers tantalizing glimpses into Bart's origin in the 31st century.