Amphibia: Darcy's Revenge (10 years later)

Ten years ago, Marcy Wu was possessed by an artificial intelligence of the greatest minds in Amphibia, a hivemind called the Core. Through its possession, Marcy became its new host, becoming the villains known as Darcy, a villain capable of mass distraction.

Marcy was eventually freed from its control, but that's what she believed. The Core then returns to seek revenge on Marcy and her friends, but this time, the Core will have a new ally by their side, an ally that destroyed them long ago. Their revenge in Amphibia will be swift as nothing can stop them now.