For the past several years, Josh D’Amaro has been running the engine of Disney’s business. But it’s not a movie studio or a slate of streaming channels. It’s the company’s lucrative and iconic theme parks. Now, the longtime Disney executive is set to take the top job. The Walt Disney Company announced Tuesday that D’Amaro will become CEO on March 18, succeeding Bob Iger after a carefully choreographed succession process. His promotion comes at a moment when streaming, film and sports media