So the DLC customization is the moon and the dodo. There is a pumpkin that I think is part of the island. There is also a pygmy stuck to a web and a baby spider about to eat him. There is a small face that comes up on the health bar when you are fighting the spider.
Now since anyone can edit Wikipedia, someone posted an update after Barking Spider, Crouching Pygmy saying the next update is an Ice Island. Do NOT listen to them. Anyone can edit Wikipedia and put whatever they want.