Young Justice (2010) members Artemis, Miss Martian, Wonder Girl and Zatanna can be seen watching Wrestlemania with via TV.
Fred's camera's brand is "Illudium Q-36," the designation of the weapon used by Looney Tunes villain Marvin the Martian.
Grey DeLisle said in an interview that certain WWE wrestlers who worked on this project were not very talented at voiceover.
When the movie aired on Cartoon Network's Flicks, it was retitled "Scooby-Doo! The WWE Mystery". Probably a trademark issue.
The only animated film produced by WWE Studios to feature the WWE scratch logo.