In the dorm room where the students perform the ritual, there is a action figure of Mike Mignola's Hellboy on the dresser and a poster of Swamp Thing on the wall.
This episode pays homage to the old Marvel superheroes-as-outsiders team, the Defenders. In the comics the Defenders included Dr. Strange, the Hulk, Nighthawk, the Sub-Mariner, and the Silver Surfer among others. The respective counterparts in this episode are Dr. Fate, Solomon Grundy, Hawkgirl, Aquaman, and Amazo. A similar homage team was assembled in The Terror Beyond (2003) and The Terror Beyond: Part II (2003) on the original Justice League (2001) series.
The first time Amazo is referred to by name.
One of the women call Shayera "Chica Halcón", the Spanish translation of her (here, former) Superhero name.
The symbol the High School trio are using for the spell look's like the Google Chrome.