Warning: Spoilers for My Hero Academia chapter #420 revealed a heartbreaking nod to author Kohei Horikoshi's canceled series, Barrage. In the latest chapter, amidst the action, a young boy resembling Barrage's protagonist, Astro, is eager to join the heroes in battle. Barrage, a lesser-known work by Horikoshi, failed due to poor readership after only sixteen chapters. Despite its cancellation, Barrage played a significant role in shaping Horikoshi's career and influenced the creation of My Hero Academia. Astro's cameo in chapter #420 highlights Horikoshi's continued connection to his old work and the lessons learned from its failure. My Hero Academia follows Deku, a quirkless boy aspiring to become a hero in a world of superpowers. With the legacy of the "One-For-All" quirk, Deku navigates hero training at UA High School while battling powerful villains.