Featured in this episode is the three-eyed alien villain Despero, who fought at least two incarnations of the "Justice League" in the DC Comics publications and this is his third appearance in an animated series, after the Justice League episode "Hearts and Minds" and Batman: The Brave and the Bold episode "The Eyes of Despero!".
In DC Comics series, L-Ron was the robot administrator for the "Justice League", which later became inhabited by the consciousness of Despero.
The events depicted occur on April 1st and 2nd.
Appearance of Arc #16: the time stamp of 00:16 UTC.