It’s going to be a skin for Renato of the newest operator. It got datamined

Nicolas cage thermite

It was leaked a few months ago that Kapkan and Finka would be getting DbD cosmetics. That being said, I think Kapkan will be Trapper or Blight, Finka will be Skull Merchant.

Caveira will absolutely get cosmetics in DBD. As for Siege, I guess original killers that Behaviour made (Trapper, Huntress, Spirit etc)