B:TB&tB episode 4
B:TB&tB episode 4 "Day of the Dark Knight!" directed by Ben Jones.
These backgrounds were for the teaser segment of episode 4. It is the first time the show goes to "OA" which is the home world of the Guardians of the Universe and the Green Lantern's HQ planet. This version of OA was designed by Nollan Obena. If you want to see Nollan's original concept drawing for the background on the right, go here:
"Batman: The Brave and the Bold" ™ Warner Bros. Animation