Let's face two things: (1) Disney has GREAT villains and (2) We love to see the villains "get theirs".
Which villain(s) comeuppance do you enjoy the most?
For me, I like to see the shadows of Scar "getting his rightful due" as he becomes the king fit for a meal.
Also, I like to hear the scream of Maleficent as she is pierced in the heart with the sword.
The Magicman