Legendary sportscaster Al Michaels wanted to break his contract with Walt Disney Co.'s ABC and ESPN to go to NBC. He didn't know he would be traded for Oswald the Lucky Rabbit. Disney executives had released Mr. Michaels from his contract, but they also extracted a series of business concessions from their rival, General Electric Co. One was the return of Oswald the Lucky Rabbit, a cartoon character created by Walt Disney in 1927 that was a precursor to Mickey Mouse. The rights to Oswald belonged to Universal Studios and Disney had always coveted this piece of its history. NBC...