The inspirational poster that Sarah takes unintentional guidance from can be seen earlier in Episode #5 (1995) (Episode 5 specifically) when the camera pans around her room while her mom is bonding with her. It can even be read if paused.
In the comics, specifically The Maxx #7, Image comic book character the Pitt appears in the Outback with Julie and Maxx, as well as in the city with Maxx while he is small. In Episode 9, which is based on issue #7, Pitt is replaced by Ret'qark'n who was first seen in Episode 7.