It looks like PlayStation Store had updated their store to preview an image for Fortnite which shows there will be pets for Fortnite. This was previously leaked, but now it seems it is official. The image is no longer available on the PlayStation Store, but Fortnite Intel managed to get the image before it was removed.
We can see the teased skins in the image in full, with another character in the back on what looks to be an inflatable llama. There is a dog that seems to be the pet of the Llama. It is not clear yet how these pets will work, but they will definitely be seen tomorrow in Season 6.