Top 3 most underrated superheroes to appreciate on National Superhero Day In one nerd's opinion, here is a short list of underrated superheroes with an honorable mention that might surprise you! Author: Destiny Johnson (KGW) Updated: 2:30 PM PDT April 28, 2021 PORTLAND, Ore. — Wednesday, April 28 is Superhero Day and to celebrate I am going to tell you some information that precisely no one asked for: Who I think are the three most underrated superheroes of all time are. Plus, an honorable mention that might surprise you! Now, let me preface this with the fact that these are MY opinions and I want to know yours! But what I do wanna do, is argue about it.