In Scream 6 (2023) a man in a Mojo Jojo costume passes the main characters. The voice actor for Mojo Jojo from The Powerpuff Girls also does the iconic Ghostface phone call voice.
In the original draft of Dawn of the Planet of the Apes (2014), Caesar's son was named River. The name was revised to Blue Eyes, but scenes still use the ASL sign for "River"