What is the name of this animation division of Warner Bros. that produced Lego DC Super Hero Girls: Brain Drain?
Warner Bros. Animation: Warner Bros. Warner Bros. Animation:  Animation (currently known alternatively as Warner Animation Group for theatrically released films) is the animation division of Warner Bros. The studio is closely associated with the "Looney Tunes" and "Merrie Melodies" characters, among others.
i don't know