Don't know about Nunn but Mitchell is rumored to be the new head of Disney.
Mitchell replaced Eisner as Chairman of the Board several months ago after the last shareholders meeting. The "rebel" group led by Roy Disney, Walt's nephew, managed to get a huge vote of no-confidence in Eisner, but not enough to outright oust him. Eisner is still President and CEO. He has stated that he will retire end of next year and has suggested that his #1 lieutenant is his choice to replace him.
There is a growing move to approach Steve Jobs, have him take over and merge Disney and Pixar. I gather that Roy Disney's group has been open to that. Jobs is a loyal Democrat, so that would appeal to Mitchell.