Godzilla x Kong: The New Empire was a global phenomenon, as audiences clearly enjoyed Kong and Godzilla taking on a terrifying new ape Titan bent on world domination. While the Monsterverse has seen its share of destructive Titans like King Ghidorah, Godzilla and Kong have typically been painted as guardian Titans in the various movies they have appeared in. While they have historically been rivals, the arrival of the new ape Titan, Skar King, forces the titular duo to team up in order to take him down, as their enemy has his own reinforcements bent to his will.

https://screenrant.com/godzilla-x-kong-villain-skar-king-explained/