Greater board involvement rarely means going down to the writer's room and making changes. If Peltz was looking to pretend to be a movie director, I wouldn't be in favor of him. Board involvement means asking the CEO and senior executives tough questions about budgets, ROI, strategy, and spending. The CEO is forced to express his longterm strategy and then revise it where the board finds issues. Peltz is busy managing a multi-billion dollar enterprise. He sits on multiple boards. He sits on the board of Unilever. I can guarantee that Peltz isn't down at Dove's HQ personally testing each new scent of shampoo. He's a big picture guy. The same will be true of Disney.
I'm open to being wrong on this, but I really doubt it. Peltz knows where his strengths are. They're not screenplays.