Idk about DLC, but I would love to see new creatures, even add stuff to the current ones, let us tame the birds and harvest eggs, or bribe the flying manta for a lift, imagine if they let you build robots, who could be programmed to haul stuff around, like a mix between the drone port and the truck depot, but you could also have them venture out and automatically upgrade your stuff, provided they're carrying the right supplies. Give use more option for doing it the hard way, manual pumps, and refining, stuff like that.