The Hulk is the most difficult Marvel property because it's always about balance. Is he a monster? Is he a hero? Are you going to root for a protagonist who spends all his time trying to stop the reason you came to the movie from happening? It's always a dance
Joss WhedonDirecting is such alchemy, it's so easy to fail. And I've seen people who are great at their jobs because everybody has a go. Editors, DPs, actors, craft services guy, everybody wants to try it out but it is such a diffuse but necessary set of skills that you never know which one this person might lack.
Joss Whedon