Share: WarnerMedia, a subsidiary of AT&T Inc. (NYSE: T), is bringing back one of the most iconic brands in animation by renaming its’ European television animation studio after Hanna-Barbera. What Happened: The Cartoon Network Studios Europe is now the Hanna-Barbera Studios Europe. Sam Register, president of Warner Bros. Animation and Cartoon Network Studios, and Vanessa Brookman, head of Kids EMEA, will serve as co-leaders of the London-based studio. It is currently working on the series “Elliott From Earth” and “The Heroic Quest of the Valiant Prince Ivandoe” and on a feature-length television film “The Amazing World of Gumball Movie.”