Disney, as the rights holder, had plans for a sequel to Monsters, Inc. since 2005. Following disagreements with Pixar, Disney tasked its Circle 7 Animation unit to make the film. Billy Crystal, John Goodman, Steve Buscemi, Bob Peterson, and John Ratzenberger reprise their roles as Mike Wazowski, James P. Sullivan, Randall Boggs, Roz, and the Abominable Snowman, respectively.