Vigo's Fog Vial
Time moves differently and disjointedly in the Entity's realm. One of the few to canonically escape is Alan Wake, but whilst he reappeared from the lake 13 years later, it's been stated by Sam Lake time worked differently in the Dark Place, so Alan could have been in there for hundreds of years, and possibly many of those in the Entity's realm.
Another believed to have canonically escape is the mysterious Vigo. In fact, it seems he has not been in action for a while. However, now we come across this new item labelled "Vigo's Fog Vial" and it makes me wonder why this item wasn't in play lorewise, especially when an arguably stronger Vigo invention (the Hatch) existed much earlier and was once upon a time really strong.
Is this undiscovered tech found wihin the realms? Did Vigo never escape, but hid to learn more and give the illusion he escaped? Has Vigo returned (willingly or not) and starting to create new weapons? It would be interesting to see if anything comes from this