Originally Posted by DW4
Iron Man is not one of the top Marvel superheroes among Spider-Man, Wolverine and Hulk.
He is now. Hopefully Cap & Thor can follow suit. With established superheroes like these and the ones you mentioned with decades of stories to each other their names, the character is bigger than the actor who portrays him/her. This is in sharp contrast to characters like Harry Calahan, Indiana Jones or John McLane who have ever only been associated with one actor from their very begining.