i definitely want and hope to see more of simon on fionna and cake season 2 (like. obviously lol) but i don't really see a way for him to be a major player again. i thought his story arc had a rushed conclusion on the first season, but it was still, you know. a conclusion. and not even a bad one, just one i thought needed more time to be worked through. but now that it's done, i think we've pretty much exhausted all there was left to explore about his character, so i expect we will just keep up with him + how he's moving on with his life