Though there are a lot of heroes, science fiction, and fantasy manga and anime (as well as horror, cooking, and drama), western-type spandex heroes aren't that big a theme for those platforms. My Hero Academia is a welcome addition to those few and has been popular in Japan for the last few years. My Hero Academia started out as a manga in Weekly Shonen Jump in 2014 and as an anime in 2016.
The story takes place in a world where 80% of the population has a "Quirk" (this universe's word for power), main character Izuku Midoriya aka. Deku was born without one, but was desperate to have one. One day Midoriya meets his hero All Might and somehow gets into U.A. High School, the school for heroes, where he and his classmates have to prove themselves… and grow up just a bit too quickly.
My Hero Academia came westward by way of Viz Media in 2015, and the anime was "simulcast" via services such as Funimation (who licensed the property in the west) and their partner Crunchyroll. The show just started its third season on April 7, and now there will be another way to watch the show in the US.
Funimation and Cartoon Network's Toonami have announced that the show will be airing on Toonami starting on May 5 at 11:30pm ET. Toonami says that all three seasons will air on their channel.