This film serves as a stand-alone sequel to the live-action miniseries released in 2002. And features some of the same characters.
Ogthar was mentioned in the Dinotopia (2002) miniseries when Carl visits Cyrus Crabb. Cyrus mentioned that Ogthar was mythical creature that ruled the world beneath as a legend.
Davis Doi worked on three dino-related projects: The Land Before Time XIV: Journey of the Brave, Dinotopia, and Bob the Builder: Big Dino Dig.
Tara Strong Michael Clarke Duncan and Malcom McDowell all acted in Star Trek. Michael Clarke Duncan voiced in Star Trek Klingon Academy and McDowell was the main Enemy in Star Trek 7. Tara Strong was in Star Trek: Starfleet Command: Orion Pirates.
The music that plays in the trailer is "Main Title (Trailer Music)" by APM Film Orchestra, which was also featured in the trailer for "Clifford's Really Big Movie (2004)".