Jurassic Park 4 will reportedly feature underwater dinosaurs and return to the Isla Nublar location of Steven Spielberg's 1993 original.

Director Colin Trevorrow's blockbuster sequel - due to open in cinemas in 2015 - is also expected to be shot and released in 3D, making it the first film in the series to utilise the format.

According to JoBlo, the sequel will see John Hammond's original vision for a dinosaur theme park fully realised.

At the Sea World-style resort on Isla Nublar, dinosaurs such as velociraptors and tyrannosaurus rexes will be tamed and muzzled, while in one sequence a giant underwater beast will allegedly jump out of a lagoon and eat a strung-up great white shark.

A dinosaur unseen in the previous movies will provide the main threat in the film when it breaks free and rampages across the park.

Rise of the Planet of the Apes screenwriters Rick Jaffa and Amanda Silver have provided the script for Jurassic Park 4.

Sam Neil recently claimed that his character Dr Alan Grant will not appear in the sequel, which he described as "a big reboot, a total rejig" of the series.

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