You want crackpot, I've been doing a bit of lore digging as I've not been into Forgotten Realms stuff since BG2, am wondering if the "ancient evil" that has re-awoken is going to be Moander. Taken from the Fandom page:
The Truth about his "Death"
What was always considered perplexing about Finder's success at "killing" Moander was, that he had success at all because gods could only be killed by other gods in the true sense. The supposed explanation was, that Finder had Tymora's support at doing the deed and succeeded only because of it. The truth about it was, that Finder didn't succeed at truly killing Moander. The old god's consciousness remained in Darkwatch, where it drained power and gained strength from people visiting the place and one creature of sufficient strength, like an avatar or a Chosen, would be enough for him to regain his demigod status. The method by which he lured people to Darkwatch was by infecting those with special spores. These spores could straightforwardly eat people or influence them like through suggestion to make the infected send more to be infected. Another method by which he lured people to Darkwatch was by making the appear like one of religious significance. This was met with different degrees of success. Clerics of Cyric ventured there to relish the dark energy there while Vhaeraun following drow wanted to have nothing to do with the place.
Kinda sounds like what's going on in the game now right? And with the Jergal link you discussed, and the Book Of Dead Gods we find with "three names scrawled out", I'm wondering if the whole Pantheon of Death is having a reunion...
