With Dominion potentially returning to Isla Sorna aka. Site B, the island could be the key to ending the Jurassic World trilogy's story. 1997's The Lost World: Jurassic Park isn't typically considered the high point of the franchise, but it did add an important element to the mythos of the original Jurassic Park movie. Both the film and the Michael Crichton novel from which it was adapted introduced the idea of Site B, a place where InGen cloned and bred their many dinosaurs before transporting them to Isla Nublar. When his dream of a dinosaur theme park went down in flames, InGen founder John Hammond thusly attempted to redeem himself by pushing to make Isla Sorna a natural preserve for the creatures - something he was eventually able to do by the end of the sequel.
While the island was subsequently revisited in Jurassic Park III, it has yet to play a role in the plot of the ongoing Jurassic World trilogy. The first Jurassic World movie picked up in real-time (22 years) after the events of Steven Spielberg's original 1993 blockbuster, with Masrani Global Corporation having since bought InGen, resumed its dinosaur cloning, and successfully opened the eponymous theme park on Isla Nublar. After the resort was shut-down in the wake of the Indominus Rex and other escaped creatures wreaking havoc upon its guests, the island was faced with a new threat: a long-dormant, then suddenly active volcano that threatened to wipe out every dinosaur still living there.
As seen in 2018's Jurassic World: Fallen Kingdom, the trilogy's leads Owen Grady and Claire Dearing were able to help get many of Isla Nublar's dinosaurs out in time, only for them to wind up being imprisoned and put up for auction on the black market. The movie ultimately ended with the creatures being set loose into the world, leaving it to the upcoming Jurassic World: Dominion to answer the question of what will become of them, and whether dinosaurs will be able to coexist (more or less) in harmony with humanity or have to go extinct once again. This could be where Site B comes into play.
Jurassic World 3 Is Returning To Site B, Isla Sorna
Recently, Dominion director Colin Trevorrow (who also helmed Jurassic World and co-wrote Fallen Kingdom) confirmed the film will revisit Site B one way or another by posting a set photo that shows an InGen container labeled, very clearly, "Site B: Isla Sorna". Despite being overlooked in the previous two Jurassic World movies, it's only appropriate Isla Sorna finally be acknowledged in the trilogy finale. Both Trevorrow and the Dominion cast have played up the idea of this installment being as much a conclusion to the six-part Jurassic film saga as is it an ending to the Jurassic World trilogy. To continue ignoring the island's existence would be to leave a pretty significant plot thread dangling after 2001's Jurassic Park III established the second dino-island is still going strong four years after The Lost World.
Site B Is The Only Dino-Island Left After Isla Nublar's Destruction
Since Isla Nublar is no longer around after its destruction in Fallen Kingdom, that leaves Isla Sorna as the only dino-island standing at the beginning of Dominion - in theory, anyway. It's debatable what state Site B will be in when the film picks up: a tie-in website created for the Dinosaur Protection Group (an organization founded by Claire between the first and second Jurassic World movies) revealed the island's dinosaur ecosystem was destabilized when InGen carried out illegal cloning in 1998 and introduced the Spinosaurus (as seen in Jurassic Park III) into the population. After the creature replaced the T-Rex as Site B's apex predator and threw its natural order out of whack, Masrani transported the remaining dinosaurs to the Jurassic World park and Site B was abandoned.
Still, it would make sense for there to still be some dinosaurs (perhaps smaller species that are better at avoiding being captured or eaten) living on Site B when Dominion starts up. The movie could also simply elect to retcon or ignore the DPG website, which was only ever a piece of viral marketing anyway, and not something the majority of moviegoers are going to be familiar with. Alternatively, it's possible part of the plot of Dominion will involve humans visiting Site B to determine whether the island is still capable of sustaining dinosaurs in large numbers given the rights conditions. Under those circumstances, it would be useful to have some individuals along who've actually been to Isla Sorna at some time or another, bringing us to our next point.
Site B Can Explain Dominion's Returning Jurassic Park Characters
In addition to bringing back human characters from the first two Jurassic World movies, Dominion will feature the return of the original Jurassic Park's three leads: Sam Neill as Dr. Alan Grant, Laura Dern as Dr. Ellie Sattler, and Jeff Goldblum as Dr. Ian Malcolm. Of the three, only Malcolm has appeared in the Jurassic World trilogy so far, with scenes depicting his testimony before the U.S. Senate about how to best handle the situation with Isla Nublar bookending the events of Fallen Kingdom. However, Neill has already confirmed that he and his costars will appear throughout the events of Dominion and not just as a cameo, in turn underscoring the idea that Trevorrow is really trying to tie the franchise all together with this film.
Seeing as Malcolm and Grant both visited (make that survived) Site B during, respectively, The Lost World and Jurassic Park III, it's possible part of their roles in Dominion will involve them consulting on the idea of Isla Sorna being inspected and used as a natural preserve for the dinosaurs again, albeit this time permanently. And despite having never been there herself (recall that, during Jurassic Park III, she was contacted by Grant via satellite phone, and sent in the Marine Corps and Navy to rescue him and the others stranded on the island), Sattler's knowledge of paleobotany could prove similarly indispensable in determining whether Site B can be used as a new home for the dinosaurs in the film.
How Isla Sorna's Return Can Help End The Jurassic World Trilogy
Depending on how it's incorporated into Dominion's plot, Site B could be where the dinosaurs roaming freely in the world are moved to, giving them a place completely their own to reside in peace (rather than as a theme park attraction). It would be a much better way for Jurassic World's leads to honor Hammond's legacy and brings things full-circle to the original Jurassic Park by revisiting its themes about the responsibility that comes with wielding the power of creation. Obviously, such an ending would be similar to the conclusion to The Lost World, but with the benefit of having tied off a massive dangling thread (the question of what became of Isla Nublar) and having firmly laid to rest any notion that a theme park full of clone dinosaurs is actually doable, much less a good idea.
The topic of animal rights has also been an overarching issue throughout the Jurassic World movies so far, making it all the more likely Dominion will find some resolution to the dilemma of what to do with the surviving - and still-growing - dinosaur population that's more complicated than merely killing them off. Site B becoming a dinosaur safe haven could be perfect for that that, providing the Jurassic World trilogy with a narratively organic payoff to Fallen Kingdom's cliffhanger ending, while at the same time calling back to The Lost World and bringing its own animal rights concerns to the forefront once more. As far as ways to close off one era of Jurassic Park/World films go (while perhaps subtly paving the way to a new one along the way), this seems like a fairly elegant solution on paper.
