Brent Lang Executive Editor of Film and MediaFresh off of upending the media landscape with their deal to combine WarnerMedia and Discovery, Discovery chief David Zaslav and AT&T head John Stankey will touch down in Sun Valley, Idaho, in July for Allen & Co.’s annual media conference.They will be joined at the annual confab of power brokers and media barons by Amazon founder Jeff Bezos, fresh off his $8.5 billion deal to purchase Metro-Goldwyn-Mayer, and will hit the resort at a time when most