Jobs has already 'taken over' Disney so to speak. John Lasseter (producer of "Toy Story", "A Bugs Life" et al) was placed in charge of the parks as a result of the merger, with the concurrence of Bob Eiger, CEO of the Walt Disney Company.
Lasseter is to storytelling what Jobs is to hardware design, and the parks are very much about storytelling - putting the guest into the story. Look for good things to come of this change, not that the parks are in bad shape today.
But as for Jobs himself, I would expect he will stay exactly where he is - at Apple... As he has publicly stated.
Steve Jobs Should Quit Apple and Head Disney