There’s nothing new in the ice age 4. They just change enough elements to make it not seem like a total rehash and cast a few more pop culture-y voice actors. In this episode the role of baddies is filled by some pirate animals, whose main motivation for being evil is that they are pirates, and many mammoth and friends once more look for a new home as the world continues to demand thier extinction. It would just be nice if it tried to be different.