The name of the villain in Poppy Playtime: Chapter 5 may have just been revealed via several Mob Entertainment copyright pages. The next chapter in the Poppy Playtime mascot horror saga likely won't release until next year, but fans may have just gotten a sneak peek of what to expect when the creepy story resumes.
YouTuber Copper spotted a number of copyright filings by Mob Entertainment on Trademarkia, a trademark website that has previously revealed early information about upcoming Poppy Playtime characters. The latest filing was registered on July 10 for a character called Chum Chompkins. It's unclear at this time if this character will appear in the next chapter of the game or an unannounced project, but it seems likely to be a Chapter 5 villain since it was filed on its own, instead of in a group with other characters (as would be expected of a new game).
Though there's not much to go on, it's still possible to speculate about the type of character Chum Chompkins has based on its name. The consensus among the community seems to be that the new mascot will be some sort of fish, since "chum" is both the word for fish...