Howard Stark, the international playboy father of international playboy Tony "Iron Man" Stark is depicted as Howard Hughes-esque, right down to his appearance.
However for Iron Man 2, we are introduced to a Howard Stark who was more of a forward thinking, optimistic genius. His Stark Expo was a way to bring together the great minds of the world to make the future a better place.
When looking for someone to write a theme song for the Expo, the producers turned to The Sherman Brothers. The Sherman Brothers had written what was widely regarded to be Walt Disney's theme song- There's a Great Big Beautiful Tomorrow. The song was used during the 1964 New York World's Fair at Walt Disney's Carousel of Progress. The song they came up with was Make Way for Tomorrow Today.
With this tribute, Howard Stark's character would take on a Walt Disney-ish trait.