EXCLUSIVE: While Universal Pictures has been trying all summer to generate new franchises, the studio is getting moving with the fourth installment of its biggest one, Jurassic Park. Universal is setting Rick Jaffa & Amanda Silver to write the script for the fourth film, which will be produced by Steven Spielberg and Kennedy/Marshall’s Kathleen Kennedy and Frank Marshall. Spielberg won’t direct this one. The first three films, which started with the Spielberg-directed 1993 blockbuster Jurassic Park based on the bestselling novel by Michael Crichton, have grossed over $1.9 billion worldwide collectively. Universal is rereleasing the original film in 3D on July 19, 2013. The scribe are repped by CAA and attorney Don Steele.