Flash and Black Vulcan are the only two heroes left behind on Earth, yet both are in the frame when Vartoo sends the Superfriends and Legion of Doom back to the Earth-universe.
When Batman uses his flashlight to examine the bottom of the pit, his Bat-symbol is missing in one shot.
For a supposedly "peaceful universe", Vardoo's world has some oddly-named features: the Labyrinth of Death, the Lake of Terror,.
Samurai's speech is picked up by Hawkman, who continues with Samurai's voice.