11/26/2014 03:46 EST | Updated 01/26/2015 05:59 EST

Jurassic World trailer offers surprise preview for fans

Action and adventure movie fans are gorging on the first Jurassic World trailer, which Universal Pictures released on Tuesday — two days ahead of its planned U.S. Thanksgiving Day premiere.

- On mobile? Watch the trailer here.

The move caught fans by surprise, because the studio had just released a 20-second teaser trailer on Monday.

"I’m really proud of you for going on this trip," says Judy Greer's character, who appears to be sending her young son off to Jurassic World — the fully functioning dinosaur theme park dreamed up by John Hammond earlier in the series.

"You’re going to have so much fun," ​she says ominously.

Jurassic World picks up 22 years after the events of the first Jurassic Park, but this time some the prehistoric beasts have been genetically modified to create hybrids in an attempt to draw more dinosaur-loving crowds.

"We’ve learned more in the past decade of genetics than a century of digging up bones," boasts a lab-coat-wearing Bryce Dallas Howard in the trailer, "a whole new frontier has opened up."

Giant hybrid lizards may make money, but they're "probably not a good idea" warns Guardians of the Galaxy's Chris Pratt, who stars as the more conservative-minded park keeper, Owen.

Jurassic World is the fourth film in the franchise, which has grossed $1.9 billion US worldwide since the first release in 1993.

It stomps into theatres in 3D on June 12, 2015.