The JOKER/CRUELLA fan-made trailer.

This really does work surprisingly well. Although I assume some editing was done to ensure that. But that’s fine. Sometimes you have to help nature along…

Turns out if you overlay the sound from the Joker trailer onto the Cruella one it fits so well you get a prequel film about Joker's mother. pic.twitter.com/C70lHoHQvd
— Matthew Highton (@MattHighton) February 18, 2021

Via GeekTyrant.