Back to the Future: The Animated Series episode "Solar Sailors" is set on December 15 of this year.
In the Superman: The Animated Series episode Absolute Power, a black hole acts as a major plot device.
Lightray appears in the Superman: The Animated Series episode "Legacy" Pt.
Mad Hatter also makes an appearance in the Superman: The Animated Series episode "Knight Time."
There is an example in the Star Trek: The Animated Series episode "The Slaver Weapon".
Stick is depicted in an episode of Spider-Man: The Animated Series episode "Framed".
It was the basis of the Star Trek: The Animated Series episode, "The Slaver Weapon".
Zabu also appeared in the 1990s X-Men: The Animated Series episode "Reunions."
Starro makes a cameo appearance in the Superman: The Animated Series episode "The Main Man."
Krona appears in Green Lantern: The Animated Series episode "Loss."
