nah not yet
Superman is just too insanely iconic, go to any Convention or store and there will be products of him in any part of the world. Batman similarly- look at the Batman movies or the video games or even comics- way bigger than Iron Man
lately arguably Iron Man has been as significant as SPiderman however I think thats more the Robert Downey Jr. effect. people LOVE RBJ. Without him I think the Iron Man character would be weakened extremely and I can't really say the same would effect any of the other characters (losing a certain actor).
basically you have to ask yourself- which is more popular lately- Iron Man or Robert Downey Jr? and I think its safe to say people just really really like Robert Downey Jr.
I would argue that Downey isn't even acting THAT much. the role was perfect for him because he has had a torn rich boy alcoholic life at times.
