The phrase "young superheroes" refers to young individuals who have special powers or abilities that they use to help others and save the day, just like superheroes in movies and comics. Full definition
Teen Titans is cartoon about the adventures of a group of young superheroes, including Batman's side kick Robin. (smallbizlabs.com)
At times the focus might be too much on teenage angst (Superboy has daddy issues with his genetic «father» Superman for instance) but the positives far outweigh the negatives and Young Justice is recommended viewing for both older and younger superhero comic book fans. (scifimoviepage.com)
After that we may see either a full reboot or a new Avengers ensemble made up of new and younger superheroes like Black Panther and Spider - man. (indianexpress.com)