This is an idea I have had for a while.

Novus Genetics is the main rival of InGen,but has always fallen behind it. And when InGen revealed that they had created a theme park with living dinosaurs, Novus felt that they needed to bring something to the table that that could top Jurassic Park. They looked at the time before the Dinosaurs, but the fossils are much too distant to get any DNA or cells from them. But then they looked at the period after the Dinosaurs, and found that cells were easier to extract. And, after some extensive genetics, they had living breathing Mammoths, Terror Birds and Sabre Tooth Tigers etc. But after some fatal accidents, it was closed and left to rot. With all the creatures still alive and insie. Now, many years later, Novus has sent in trained hunters and zoologists to re-capture the lost park.

Some main creatures will be...

-Livyatan, a giant predatory whale.
-Mammutus, the Woolly Mammoth
-Smilodon, the sabre tooth tiger
-Paraceratherium, the largest land mammal ever.
-Titanoboa, a gigantic snake
-Megalania, an immense relative of the modern day monitor lizard
-Andrewsarchus, a gigantic wolf-like predator.

There will be lots of more obscure and less important creatures as well.

So, thoughts?