The Malusaurus was a fictional dinosaur that was, at one point during development, intended to be the main antagonist dinosaur of what would eventually become Jurassic World (Then known as Jurassic Park IV). The Malusaurus was going to be a species of dinosaur discovered in China during the opening of the movie.[1] It was later replaced by the hybrid species "Diabolus Rex", which would eventually become the Indominus Rex.