Emily and Victoria are sisters.Think about it. According to Emily's story, her family was very wealthy until Barkis killed her and took all of the money. Meanwhile, the Everglots are revealed to be going through a recession after losing all of their money. Don't you think there's a connection between these two subplots?
The Corpse Bride is a sequel to Frankenweenie.Both films star a protagonist called Victor, and age aside, they look virtually identical.
Victor and Victoria will have a daughter named EmilyEmily was very important to both of them and this would make for a Heartwarming Moment.
The Maggot being a Peter Lorre impersonation was intentional...... and it was originally going to be accompanied by impersonations of Boris Karloff and Lon Chaney Jr., to make for a shout-out to the Route 66 episode "Lizard's Leg & Owlet's Wing".
The Land of the Dead is actually Planet Limbo set in the Victorian era
Some of the citizens of the Land of the Dead were never actually alive to begin withThe Maggot and the Black Widow spiders come to mind, since they wouldn't talk if they were simply reanimated versions of their respective species like Scraps. There's also Bonejangles, who, if he was alive to begin with, would've looked out of place in the movie's setting of a Victorian village, wearing a bowler hat and being a jazz singer (that, and assuming that it isn't just a nickname, his name "Bonejangles" is probably something that no one in the Land of the Living would have been called).