Marley's corpse at the very beginning of the movie has two coins placed over his eyes while his glasses are turned up on his forehead. The overall look is somehow creepier than when Scrooge steals the coins back.
The whole scene with Jacob Marley. He's introduced by throwing his ghostly safes through Scrooge's door, he floats in midair, his eyes rarely focus - and that's just his general appearance. He's constantly scaring Scrooge by screaming and howling, and at one point he dislocates his own jaw and, still needing to vent his anger, he jerks it up and down with a whole lot of cracking sounds.
Even worse is his very first appearance: after Scrooge approaches the door to his home, he drops his keys. After bending down to pick them up, he is surprised to see a green ghostly face (Marley) in the door knocker. Reaching out to touch it, we are then greeted with the horrifying sight of his eyes and mouth suddenly opening, complete with his teeth flying out and a very loud bang. Many have commented that this is the scariest jump scare in the film, and for very good reason.
The death scene of the Ghost of Christmas Present, which is more disturbing than in any other adaptation. As in the novel, he rapidly ages, but instead of just disappearing when his time is up, he clutches his heart in pain with each chime as the clock strikes 12, then collapses. Then he turns into a skeleton, still laughing all the while, and then crumbles to dust.
Ignorance and Want. Instead of just being shown as two starving, ragged children, they also age before Scrooge's eyes into the type of adults that such children become if they're not saved. When Ignorance grows up, he becomes a vicious knife-wielding criminal and is locked away in jail. When Want is shown as a grown-up woman (most likely a prostitute), she is strapped in a straitjacket and dragged away screaming.
The beginning of the Ghost of Christmas Yet to Come scene involves Scrooge being chased by Marley's funeral wagon, driven by ghostly horses complete with Red Eyes, Take Warning.
The Ghost of Christmas Yet to Come is a Living Shadow, and is almost never seen in 3D, being up against the wall, floor, in Scrooge's shadow, or slithering across bedsheets as it tries to make Scrooge look at his own corpse.