Follow the Leader: Star Wars seems to be a major influence on the series, especially most of the Five-Man Band. Jayce=Luke Skywalker, Herc=Han Solo, Gillian=Obi-Wan Kenobi and Oon=a combination of C3PO and R2D2.
There's even a junked robot resembling C3PO in the episode "Vase of Xiang."
What Could Have Been: A movie was set to be made as a Grand Finale where Jayce would meet his father Audric and be trained by the original Guardians. Saw Boss would kill Audric and Jayce would finally unite the magic root, destroying the Monster Minds once and for all. Due to the failure of the toy line, the movie was never made.