Trivia: All throughout the movie you can see the number 801, which was used in the movie marketing campaign on Cartoon Network (the original release date was August 1st.). The two most obvious examples are when the car crashes into the building in the beginning of the tag scene, and when Mojo first shows his blueprints.
Trivia: When Hobo Jojo picks up the newspaper and begins to read it, the Dear Donna section on the back page has the line "Dear Donna, I am faced with the difficult prospect of completing an entire animated feature in less than six months," and then continues on. This may be a reference to the real film's shortened production deadline. (00:21:30)