Zemus never really bothered me like say Necron did. Of anything my issue with Zemus compared to CoD and Necron is that there is enough backstory to him to make me want to learn more about him pre-sealing. Of anything, I would be more curious to know what the other Lunarians had planned to do with him when Cecil's world did catch up to them and they could integrate better. I mean was he just going to stay asleep forever?