Personally, I think it's extremely telling that the Karmic Worm that Cake meets looks exactly like the space wedding aliens we see in Graybles 1000+, who were previously- and for obvious reasons- thought to be the descendants of Jake the Dog and his Pups (check out the Pup Kingdom).
Just speculating here, but I think the show low-key gave us one of the major clues as to how the Graybles future comes to be, and where those googly-eyed aliens actually came from. If they were pups, you'd think they'd look more...idk, dog-like?
(And yes, before you say it, I'm aware that Jake Jr. doesnt look like that at all, but Charlie sure did, and she and Kim-Kil-Wan are the progenitors of the future Pup Kingdom, unless I totally missed something.)
TLDR, I suspect that Cake and the Karmic Worm are gonna hook up and create the race of space wedding aliens that attack Cuber in Graybles 1000+, and that Fiona and Cake (the show) is really just the catalyst for ending the world of Ooo as we know it.
Let me know what you think
