Codemaster's just tweeted this image with the message "Ohhh shi....... RUNNNNNN!!!!!!!!!!!", suggesting a new Overlord game is coming. A new Twitter account for Gnarl, the series' chief minion, also started up a few hours ago.
Just, please, don't be a crappy mobile or free to play thing. After recent redundancies and a focus on racing titles I'm not sure what to expect.