Just six weeks after the closing of a powerhouse media merger, Warner Bros. Discovery held its first upfront presentation on Wednesday in front of a capacity crowd at The Hulu Theater at Madison Square Garden. Company executives and a long roster of celebrity partners pitched the newly formed media giant as equivalent to the fifth broadcast network, but remained tight-lipped about how or when a proposed combined streaming platform would roll out, even as ad-supported video on demand is poised to be an area of investment and development for the company.