The scene with Frozone and his wife arguing has somewhat deep implications when you think about it. Depending on what she is, it could either be a Deconstruction of the super-marries-normal trope (Superman x Lois Lane, Spider-Man x MJ-pre-Quesada), or a take on the Super Couple thing that Bob and Helen have. Either way, it shows how much depth Pixar puts into their work, when even little scenes like this are more than meets the eye.
In The Incredibles, Mr. Incredible and Incrediboy /Syndrome have the same initials: Bob Parr and Buddy Pine.
Why did Syndrome choose the name 'Syndrome'? According to dictionary.com, syndrome can mean "The pattern of symptoms that characterize or indicate a particular social condition." Keep in mind that Syndrome is Incrediboy and he pretty much had his hero tell him he was useless, and that he has shut himself off from the world to get revenge. Syndrome has ASPD.
It always bugged this troper as to how on earth Helen wasn't injured when she shielded the kids from Syndrome's missiles. And then he remembered; Edna made her supersuit virtually indestructible. Her suit acted as a built-in shield.
Both Dash and Violet have names that match what their powers are: Dash has super speed, and Violet can create forcefields and become invisible. So when Jack-Jack was given his name, it was an indicator that he was a jack-of-all-trades, because of his myriad of powers that he demonstrates in the short and at the film's end.
When Syndrome flashbacks to Mr Incredible telling him he works alone, Bomb Voyage is missing from the scene. Shows how he got into that state of mind.
