The drunk guy on the phone in the year 2000 when Bender arrives to kill Fry is the cryogenicist seen at the end of Season 5's Jurassic Bark (2002), complaining about his hangover from the night before.
When Amy receives the barrage of pop-up ads on her laptop, one says "Watch Comedy Central." Comedy Central aired Futurama (1999) in re-runs and aired this movie edited apart into four separate episodes.
Amy Wong's email address is "awong@marslink.web," Zoidberg's is "zoidberg@freemail.web" and Bender's is "bender@ilovebender.com." Amy and Zoidberg's are fake, but www.ilovebender.com is a real promotional site for the movie.
The heads of Jon Stewart (of The Daily Show (1996)), Apu (from The Simpsons (1989)) and Eric Cartman (from South Park (1997)) can be seen among the many unidentified heads in the head museum. Stewart and Cartman's heads serve as an homage to how this film was produced with the intention of it later being split up into four episode-segments and aired on Comedy Central instead of Fox, the former home of Futurama in its TV series form.
The time code seen in the Bender tattoo is made of six columns of binary digits. The first three columns show the binary form of the numbers one to six. The last three columns are simply the same digits as the first three in reverse order.