Yeah, I'm thinking that right. I still think the question of what god / consortium of gods is behind it remains. So we have the symbol of the dead three, shadow magic which means Shar and we have mind flayers which would mean Illsensine or Ioulum.
It's far out that but we have one 'triune' goddess already -- perhaps the mind flayer circle that we saw was really the form of the consortium?
Aside from the symbols of the dread three though what other evidence is there for their involvement?
Shar has shown a crazy amount of involvment, and his seemingly directly involved with the tadpoles, Moonrise towers also seems covered in Shar paraphernalia, and a Shar cleric was given a special place on the Nautiloid.
We also know Nautiloids shoudent be around anymore.
If we want to get tinfoily we also have Gale, who's lover could have been Shar, manipulating him,, instead of Mystra.