A new update for TF2 is out (ChangeList) and a Steam Web API (Link)
But with the release of this update, it seems like a new weapon was introduced in the game files: The golden wrench (Video). Also it shows up on TF2 items (TF2 Items)
It could be a new game mode or a new weapon. What do you guys think of this weapon (see video) as new Engie weapon?