The Marvel Creative Committee was created by former Marvel Entertainment CEO Ike Perlmutter, with the idea being that they'd be there to ensure any future adaptations would remain true to the brand (and, thereby, the comic books).
Bleeding Cool has transcribed a number of excerpts from The Wall Street Journal's podcast, The Journal, and in that, reporter Ben Fritz explains the true reason for its formation was to essentially keep an eye on Hollywood executives.
Money ultimately proved to be a sticking point, with Marvel Studios President Kevin Feige essentially having to ask comic book writers to increase the budgets of movies being developed. However, creative decisions were also scrutinised by a group whose continued interference is widely believed to have prompted Feige to push Disney CEO Bob Iger to make Marvel Studios a separate entity.
According to Fritz, "during the production of Iron Man 2, members of the Creative Committee hated how Iron Man acted when he was drunk, including a moment when he pees in his suit. That scene stayed in the movie, but the Committee convinced Feige to trim some dialogue they thought made Iron Man seem cruel."
The site goes on to reveal that there was even a scene with a drunk Tony Stark hitting Pepper Potts in a moment of frustration. However, the Creative Committee members believed it was a step too far and pointed to Hank Pym striking Janet Van Dyne as an example of how hard something like that is for a character to come back from.
Comic book writer Brian Michael Bendis didn't comment on what many feel was the watering down of "Demon in the Bottle," but suggests Perlmutter may have ultimately used the group as a means of spiting Feige.
"I do feel that the Creative Committee was a tool that was being used to help and that eventually, slowly, over time, it was being used as a tool to be antagonistic on some level. Again, it never happened in front of me, but I do know it went from a tool everyone was happy with to a tool that was frustrating people."
This ultimately led to a clash over Captain America: Civil War which saw Marvel Studios freed from Perlmutter's oversight when he refused to pay Robert Downey Jr. the sum needed to get the actor back as Iron Man.
The movie would go on to gross over $1.1 billion at the worldwide box office.