"Jurassic Park III director Joe Johnston revealed in an interview in January 2010 that Jurassic Park IV was set to be the beginning of a second Jurassic Park trilogy. He also added, “Jurassic Park 4 is going to be unlike anything you’ve seen.” According to a new interview conducted in 2010 by Drew McWeeny with Joe Johnston on the website Behind the Films, a new script is under works with a different idea behind it. Johnston says once he finishes Captain America, he hopefully will develop Jurassic Park IV with Steven Spielberg. It certainly seems probable that we will see "Jurassic Park IV". Joe Johnston enthusiastically has confirmed the likelihood of the film's production more than once."
Not sure if this is news to anyone, but I thought it was pretty damn awesome as I love the Jurassic Park franchise.