Well there's many minor superheroes that people tend to forget so finding the least popular superhero would be hard. But in terms of the famous superheroes, I would say aquaman. Many people make fun of aquaman due to his uselessness outside of the water and because his power of talking to fish seems pretty dumb.
ironman
Aladdin is a cartoon character, not a superhero.
Commonly accepted first superhero is 'Mandrake The Magician'(1934) by Lee Falk. And the second superhero is 'Phantom'(1936) by Lee Falk. He was the first superhero to wear a costume.
The superhero superman is who I think says up up and away but I am not positive
The cast of Superhero - 2013 includes: Charles Hurston Darren Nowell
spiderman
batman
I am sure that noone named superhero "Sphincter man", at least not yet.
ironman
He's not even popular, he's the #1 superhero of all-time.
Probably Spider-man.
spiderman
The most popular superhero movies for kids are Spiderman, Superman and Batman. This movies are accompanied by toys and other merchandise that keeps kids interested in the brand.
Example sentence - It's a bird! It's a plane! It's Superman!
Superhero movies have become quite famous in the last twenty years. A couple of the more popular ones are Superman, Batman and Spiderman. The latest popular Superhero movie that has been released in theaters is Iron Man. Most of these movies have created sequels to the original.
grocery store, church, bar
The uniquely English word "superhero" is very similar when translated to Japanese. It turns out to be "Supahiro" and they are just as popular there as they are in the United States.