Wikimedia Commons/Monsters Inc. 3 Movie Return to Monstropolis! Pixar is developing Monsters, Inc. 3, a new sequel to the beloved animated classic. Get the latest news and updates. March 15, 2026 AceShowbiz - More than 20 years after the original Monsters, Inc. became a fan favorite, the beloved franchise is set to expand with a new sequel. Pixar is currently developing Monsters, Inc. 3, inviting audiences back to the vibrant world of Monstropolis and its unforgettable characters. The initial film introduced viewers to the charming friendship between Mike Wazowski and James P.