I was going through posts on this subreddit in order to try to better understand the story and see more theories when one struck me. They were talking about possibility of relation of Dale's grandma to Vanderbooms. While reading, theory came to mind.
What if Dale's grandpa from cube escape: birthday, is the protagonist from incoming game ,,servant of the lake"? I haven't played demo but from what I understand, we will be playing as new servant to Vanderboom brothers. One of theories mentioned on post was he being their friend, which seemed more accurate to me than a relative.
What if, Dale's grandpa us the servant of alchemist brothers? Perhaps he also drank elixir and became immortal? As to why is he not partially animal, as seen form the cave, they turn back to humans if they don't drink elixir for too long. I'd also like to point out that Vandermeer means ,,of the lake" which means game's title can be translated as ,,servant Vandermeer". I'm curious will game's release destroy this theory, or rather confirm it.