Warner Bros. today launches its new "Max" streaming service that merges HBO Max and Discovery+ content, and the new rebranded app is already appearing on Apple devices and can be downloaded from the App Store. Announced last month, Max includes all HBO series and movies, Max Originals, and select series and movies from Warner Bros., the DC Universe, Cartoon Network, the Turner Library, Looney Tunes, Adult Swim, and more. It also rolls in Discovery favorites from TV brands including HGTV, the Food Network, TLC, ID, Magnolia Network, Discovery, and more. The new Max service also claims to feature smarter recommendations, improved app performance, easier sign-in and navigation, new profile PINs for adult profiles, and new Hubs and genres. Warner Bros.…