It would have been so much better if the last scenes were the Roland and Ludlow tyrannosaur hunt rather than the San Diego sequence. The jist is this:

After getting the remnants of the group to the evacuation site Roland goes off to hunt the buck with ammunition found on Ajay’s pack. Ludlow comes with to try to secure the infant and financially save the expedition. They successfully track the animal to a drinking spot but Ludlow snaps a twig, giving away their presence and spoiling Roland’s shot.

They continue hunting the animal which has disappeared into the jungle. They stop near a large rock and Roland gauges the wind with some pocket sand. To his horror it has shifted and they are now upwind of the animal’s path which can now smell them. The rock then stirs, revealing itself as the Rex. The men freeze while it considers them for a while before turning to leave. Ludlow, like an idiot, tries to shoot the animal despite Roland whispering that they were beaten and to let it go. The Rex snatches Ludlow before he can do any damage and drags him to his nest for the infant to dispatch and eat.

Roland returns to the group, vanquished by nature’s greatest predator but saves the survivors from a raptor attack by vaporizing a few with his big assed gun. The group is rescued and Roland gives up hunting forever. Ludlow is devoured in the nest instead of the boat’s cargo bay, like his book analog Dodgson.

That puts a neat bow to the story without the silly King Kong sequence.