At this point in time, Universal Pictures Jurassic World will at the very least wind up as the fifth highest grossing film of all time, having recently surpassed Avengers: Age of Ultron. So, it makes sense that the inevitable Jurassic World sequel would be put on the fast track, which appears to be the case.
According to a post made by user spatulashack on a thread at The Box Office Theory, the script for the fifth film in the Jurassic Park franchise will be done as early as August.
“Colin (Tervorrow) and Steven (Spielberg) had a meeting with Donna Langley and the goal is for Colin to have a very rough script by August. Colin isn’t directing the sequel but he will be very involved just like Spielberg. And if Spielberg doesn’t like the script, the studio won’t set the date yet. In other words, this won’t be like the Furious films. We’ll be getting a sequel and it’s all happening quickly but the cameras won’t start rolling until both Donna and Spielberg are happy,” read the post.
Obviously this is by no means official, so it should be taken with a grain of salt. However, this particular user has a track record of posting correct information in the past, so it isn’t outside the realm of possibility. It should also be noted that this will be a rough script. Rewrites will need to take place and it will need to be approved down the line.
Trevorrow directed Jurassic World but made it very clear he wouldn’t be returning to direct the sequel but he did make it clear he would be involved in some capacity. Assuming this information is even somewhat correct, it looks like that capacity will be as a writer and producer.
As far as casting goes, Chris Pratt has confirmed that he will be returning for at least one more installment of the JP franchise. B.D Wong and Bryce Dallas Howard are also likely to return.