One year ago, David Zaslav, the C.E.O. of Discovery, and John Stankey, the C.E.O. of AT&T who oversaw its ill-advised conquest of the WarnerMedia assets, met for breakfast at a rented Greenwich Village townhouse to start formally discussing what would become one of the biggest media mergers of the decade. Two weeks from Monday, they will officially close that deal, giving birth to a new, Zaslav-led media giant with ambitions to rival the likes of Netflix and Disney. The close of the WarnerMedia-Discovery merger, and the launch of Warner Bros. Discovery, will take place on April 11, sources familiar with the matter tell me. Zaslav and his team are currently making plans to ring the bell on the Nasdaq stock exchange that morning.