Voyager7, a classic Dwango moderator, has put this mystery to rest! Check out the thread here: https://www.doomworld.com/forum/post/2405628If you like this, ...
A quick video on where DWANGO 9 is at. It was solved not long after the video was posted. Doomworld Thread
Neat. Wad archive before it shut down had hashes for all lumps in its database.