Don't mess with Indominus Rex.

A new trailer for "Jurassic World" just dropped, giving us our best look yet at all the different dinosaurs inside the now fully-realized park.

While the sneak peek starts out by focusing on some familiar breeds, like those nasty velociraptors, all hell breaks loose once we meet a genetically-engineered new attraction. 

The Indominus Rex was created to bring more spectators to the island, as Bryce Dallas Howard's character says they see ticket sales spike every time they add something new. 

But there's something a little off about this one ...

The giant creature is definitely more violent and much smarter than her fellow dinos. We hear she killed her own sibling, hunts for sport and even remembered where her tracking device was implanted. She can also communicate with other dinosaurs.

That killing for sport line really hit a chord with us ... think she was spliced with human DNA??

Check out the trailer above to see the scariest (and most explosive) look at this film yet. 

The flick, which also costars Chris Pratt, Ty Simpkins and Vincent D'Onofrio, opens June 12.

ICYMI, new trailers for "Fantastic Four," "Star Wars: The Force Awakens" and "Batman v. Superman: Dawn of Justice" also dropped over the last couple days -- check 'em out below!

Which are you looking forward to most? Sound off below!

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