I have a different theory. I think this is a sign of something big coming, but I haven't seen it hinted anywhere. Iger needs a big boost right now. Iger's biggest successes have been major acquisitions, and I think we are line for a doozy.
As
@BrianLo pointed out, many of Disney's best execs came from acquisitions too, including Iger. So, what would a CEO of a major company want as part of a deal? To be first in line, so they show Staggs the door with a nice parting gift. Then, six months from now the bombshell drops that Disney is purchasing -------- (the billion dollar question is who???) and the CEO is named as Disney COO and Iger's successor. He/she has 18-24 months to learn the company and Iger walks off into the sunset.
Now, it's all a theory, but the dots do connect. And, I have no idea of the company that could be acquired, but I think it would need to fill the major gap in Disney... Content distribution. The question would be if Iger would go for a Netflix type company or go the pipeline approach and buy a cable company like a newly combined Charter/Time Warner.
Don't forget that DIS is sitting on a huge amount of cash and repurchased stock. The funding is there. Just throwing it out there.