We don't know. That's why we're asking you. If you know, please tell us.
You remember the Sumo Digital guys. They made LittleBigPlanet 3, Forza Horizon 2 for Xbox 360 and one of those Sonic racing games.
According to the developer's official website, via The Games Cabin, it's working on a "large, genre defining, unannounced AAA title.
"This is an extraordinary and genuinely career advancing opportunity for a high-achieving Designer to have a real impact on an industry changing game."
Sounds ambitious. When you live and work in Sheffield it's good to have ambition.
Anyway, Sumo is working on a bunch of stuff for Xbox One and PS4 according to its official website. So if you know what any of those are, please let us know and we promise not to grass you up for telling us.