And you know... going through my notes, it seems like we're missing something. 
Remember this from Hathos's drum?
Tho goblins rose in fury against them 
Hatho’s outraged pride has doomed them– 
Doomed the Darkfell dwarves 
To be forgotten. 
Tho Ruathgrym is held and bound 
The snakes he brought have sought and found 
The prison-place where Glamerdrung 
Bound the serpent. 
Tho Selûne’s walls have toppled 
–still the Worthy may seek the Moonweb 
Tho Cindarm’s Hall is looted 
–let this map lead ye to Crown of Fire 
Tho trails may lead to this and that 
Seek ye last the ziggurat 
And stop the snakes who try to 
Free the serpent. 
My blood has ebbed 
My life does fade 
As all my deeds are mere charade 
Let these be Hatho’s last words said: 
End my curse whose purpose is old 
Fill your heart's purse up with gold. 
And that  prayer to Meerschaulk containing the following stanza: 
...and we built steps toward the sky 
to draw you from below 
Coiled Lady of Snakes 
Fanged Goddess with a Thousand Young 
We peer into the mirror 
And see you sleeping beyond... 
Now--dragons awake!
Finally, we have that magical disk to Meerschaulk that looks like it opens something. But what?
But listen, we've lifted the curse, broken the coil, and reopened Aerunedar to the dwarves. Maybe we should just head back to Even'star and rest, I think we deserve it.  After all, people will sing the praises of the Company of the Wolf for many ....
...
... oh, crap.  Did anyone read this? Glamerdrung bound the serpent ... what Serpent?  The Naga?  The black dragon?  Or perhaps MORE dragons?  Why did the build the ziggarut?  To draw you from below  ... I think they're planning on bringing the Fanged Goddess back to this place... and with her many, many serpents... including dragons.  
And they're also amassing an army... I think they plan on brining back their goddess and the serpents and then wage a great war on Cormyr.  THAT'S why the Zhentarium are involved.
This is very, very bad. We have to stop them... NOW!