Not only is "Jurassic Park IV" official on the way, it has a release date, as well: June 13, 2014. Indeed, that is a Friday the 13th, and could bode ill for the film. While "Jurassic Park" was well-received, and both it and "Jurassic Park II" were hits, "III" received mixed (at best) reviews. To date, it is the only film in the series that was neither directed by Steven Spielberg nor based on a book by Michael Crichton.
That will change with "IV." "Jurassic Park IV" will be produced by Spielberg with a director TBD. With Crichton's death, the film will also definitely not be based on a work of his.
Last fall, Kathleen Kennedy spoke of the franchise, saying:
It's really hard to keep these things going when there's an expectation and a desire by the public and the audience to keep certain franchises going. As filmmakers, we often sit there going, 'Okay. We have to answer the question, "Why do another one?"
If you can't answer that question, you shouldn't be doing it. It's tough. We're trying to come up with a story that makes sense and isn't going to disappoint people and is, hopefully, going to get people excited and reinvigorate the franchise.
While currently unconfirmed, it is thought that the most recent draft of the script was written by husband and wife team Amanda Silver and Rick Jaffa.
Coincidentally, "Jurassic Park IV's" ultimate parent, the original 1993 "Jurassic Park" film will be re-released in 3D on April 5, 2013. It will also hit IMAX 3D theaters.