"Iger won't be very influential". You don't know Bob. His voice will pull strings behind the scene. He may even work his way back. Very few have his understanding of all of the parts. He will be leaned on heavily. Plus he is someone with political favours to spend.
He'll be in the room where it happens, sure. Point is that if anyone has creative differences with him, they'll feel no desire to align with him. It won't be like he'll be held accountable if he's wrong, and he'll be long gone by the time any current projects see daylight.
Disney (even Iger himself) has done this to quite a few people over the years. At Disney we called it putting someone in the "aloha suite"