Ruin a movie by replacing a character with Amber

Imagine that you had the power to magically remake a whole movie, but with a catch: you have to remove one character from said movie, and replace them with Amber (as a character, not an actor), affects on the dialogue and plot included. Which movie are you butchering, what do you imagine would be changed in it, and why?

Personally, I'd piss myself laughing if we could ever see The Room with Amber in the place of Lisa. Just imagine it. "You're TEARING ME APART, AMBER!"

(Bonus points if you want to go even further and replace others in the movie with Amberverse side characters!)