Jurassic Park 4 Plot Details (Mania.com)

By:Robert T. Trate
Date: Sunday, June 23, 2013
Source: Joblo

Over the weekend JoBlo had an exclusive about plot details for Jurassic Park 4. Prior to this we only knew that Colin Trevorrow (Safety Not Guaranteed) was directing. Here is what Joblo released to the masses.
JURASSIC PARK 4, set in present day Isla Nublar, is now an actual theme park, as originally intended by John Hammond in the first film. It garners 10 million visitors per year and is completely safe - until it's not. The park itself is described as very Sea World-esque and includes an area called the Isla Nublar Lagoon. That means underwater dinos for the first time. No indication of what kind, but there's concept art showing one of the aquatic dinos, as part of a show, jumping out of the lagoon and eating a strung up great white shark like it was a fish for a dolphin at Sea World. 

As part of a show, you ask? That's right, folks, this will feature "tamed" dinos. In fact, our source indicated that the usually menacing Velociraptors (which will finally be muzzled, along with the T-Rex - until they're not) will actually be used to help fight the threat, which begins in the form of a new dinosaur, not seen in any of the previous films (and not disclosed to us) shows to be much smarter than originally thought and is the main cause of havoc breaking out at the park. 

So, to sum it all up, JURASSIC PARK 4 will take place back on Isla Nublar with a fully operational dinosaur theme park (I'm sure no expense was spared) that's both prosperous and safe, until a new dinosaur figures out a way to wreak havoc, causing the use of the now tamed Velociraptors (and T-Rex? Unclear) as a means to fighting the threat”. from JoBlo

Jurassic Park 4 will be shot in 3D and the rumors of Bryce Dallas Howard and Sam Neill joining the cast have not been confirmed. 

Jurassic Park 4 is set for the biggest summer in recent movie history, 2015.