Chaos theory states that when you deal with complicated situations, the he unexpected will happen, no matter how much you think you expect them. That theory was definitely at the forefront of Jurassic World, and to deal with the chaos of the second film, Jeff Goldblum is reportedly coming back to walk with dinosaurs.
Jeff Goldblum was Dr. Ian Malcolm, a Chaos theory scientist from the first two Jurassic Park films. According to several sources, he and Dr. Malcolm will return for the second Jurassic World, which will be directed by JA Bayona.
Dr. Malcolm was referenced in the first Jurassic World film, by a book sitting on a desk.
In the meantime, you can still encounter Raptors at Universal Studios Orlando!