(Source: Storm King’s Thunder, Pages 85-86)
As you can expect, the Drow are acting independently from any Giant Group. Previously in Out of the Abyss, I had Menzoberranzan resemble Post-Katrina New Orleans after the Demons had their way with it. (If it weren’t for the party, the surface area above the City of Spiders would be considerably different, because the damage the demons would’ve made would’ve collapsed the whole city.) Naturally, every Drow House have their own way to rebuild, and if I remember right, the Drow down there are intrinsically unable to cooperate with each other, be it individually or as whole Houses. Suck is the case for House Xorlarrin), mentioned in Storm King's Thunder and used in this setting.
According to cannon, House Xorlarrin has settled into Q'Xorlarrin, an formerly abandoned dwarven city under Gauntlgrym. Knowing that they wouldn't want to share the forge with a dwarf like Bruneor Facking Battlehammer (or for that matter, dealing with Drizzt (Facking) Do'urdren), and they know by now how difficult Dwarves can be to enslave (no doubt at least one Mind Flayer told them about it). If I were Zeerith Q'Xorlarrin, I would consider moving to another place to make a forge to forge a way to rebuild Menzoberranzan, usurping House Baenre in the process. Ironslag, post-Storm King's Thunder, is a better location, but even with the volcanic fire source there, they might need something with a bigger kick: Magera.
The party will arrive in the upper entrances of Gauntlgrym--I'll have Brenor excavate and build a gate from the surface to Gauntlgrym proper--in disarray: Nobody knows exactly how that happened, but the Dawn Titan has been kidnapped, taken from his resting place, and signs of “Accursed Drow…no offense, Drizzt,” have been found.
The party will run into Draac Xorlarrin's party with Iron Flask in hand, and the encounter will ensue. I might supercharge Draac with combining Mystic (I thought that House Xorlarrin would be heavy into psionics, and I wanted to dabble with the most recent Unearthed Arcana anyway. Link: http://dnd.wizards.com/articles/unearthed-arcana/mystic-class) with Mage, making him a high-ranking member of the house. (Or create another character, a female to show a high rank in the House.) Check that, I'll make a new Mystic Drow guiding Draac and company, who takes the Iron Flask away no matter how the encounter ends up. A little more investigation will lead to Ironslag, where the party is told to go there and bring back that Titan!