Inbreeding.
The entire modern entertainment industry is painfully inbred. The original Star Wars drew inspiration from Flash Gordon serials, Kurasawa films, and sci-fi novels like Dune and John Carter - modern Star Wars draws inspiration from Star Wars. Tony Stark was inspired by Howard Hughes; Captain America started life as wartime propaganda; the Hulk was inspired by a news story. All modern Marvel stories, by contrast, take their inspiration from existing Marvel stories.
So many modern reboots - Indiana Jones, Jurassic Park, Ghostbusters, etc. - feel like inter-generational inbreeding projects that don't further the creative bloodline so much as attempt to clone it. This form of IP-led, commercially-derived Western culture is now the dominant force in mainstream entertainment and we're seeing an emerging generation who've been raised on nothing else. This inbred culture is the only frame of reference they have and the narrower the gene pool gets, the more backward and inbred the storytelling gets.
Happening in everything, not just games, but films, television, books and music too.