One analyst posed an interesting question to Disney CEO Bob Iger in the just-completed conference call to discuss fiscal Q2 earnings: In the wake of his decision last month to fire Disney Studios chairman Rich Ross, and considering how independent units including Marvel and Pixar are, does the operation even need a chairman? “It’s a big, complex global business (with) multiple moving parts,” Iger says. In addition to greenlighting movies, the studio chief is involved in decisions involving distribution, management, the library, and live entertainment. “This is a business that probably requires someone to run it,” Iger said. But he didn’t take the bait to discuss what will happen next with the job. “I’m not going to get any more specific than that,” he said.