Evidence For relatedness:
Chests are labeled in riddles
Chests were built just before VoK opened
Chests are in close proximity to strange tablets that appear to be connected with the VoK event
Chests built by a trial account that was last on right before the VoK event commenced.
Evidence against relatedness:
Chests can, and have been DPPRed
MysteryBabylon is a member of a guild (which dev accounts typically are not)
Photos and coordinates to follow
The "light of egypt" chest is full of clay lamps, and the label now includes "dont take"
the "blood of egypt" chest is empty... what goes in it? Nile Water is the obvious choice... but we dont know what happens if we guess right.
There may be similar chests in other regions, but only Kush and FP chests have been found so far. Keep hunting!