Rating boards are usually a reliable source in terms of game leaks, so it's always a good idea to keep a close eye on their sites when gaming conferences are closing in. This time it's PEGI that may have leaked a surprise.
They just rated a Ubisoft game called Grow Up. Considering it's rated 3+ our guess is that it's a sequel to Grow Home.
All we know for now is that it'll launch on PC, PlayStation 4 and Xbox One. If we were to speculate we'd also say that it might even launch during Ubisoft's conference, as PEGI usually won't rate a game till it's near launch.
You'll know if we're right by watching our live stream later tonight.