With this update, there's a new secret item that seems like only devs have atm, called of the Developer Helmet, it's a full-cover accessory for the Fire-Team and looks like a Halo helmet, datamining suggests it can be found in Field Lockers, but that has yet to be proven by actually finding it
It's also worth noting that the Predator 2 Spear is refereed as "The Classic Combistick", and not as "Classic skin for Combistick", which means it will be like the knifes, being a different model that takes a weapon slot and is the same except in looks