I posted this over on Rob's board, but I thought I'd post it here as well to discuss it with those of like-mind:
I've been considering tying the Lost City of Gaxmoor to Bottle City, making it the 'city' until THE city is released. I've previously tied Zayene to Gaxmoor, and that still works too. The outline is this: Farlanghn removed Gaxmoor to a special demi-plane to save it from destruction.(per Ernie/Luke Gygax). Gaxmoor was one of the earliest cities founded by the migrating Oeridians on the eastern side of the flanaess, located in Sunndi. Zagyg discovers the city/demi-plane and starts meddling with it. Exploring it, adding a few personal touches, and finally linking it to his dungeons (via the bottle). This explains the strange creatures that occasionally come up through the dungeons and the poor state of the city. (bottle city adventure as is, and modified Gaxmoor adventuring) Zayene learns of the city and some of the artifacts within. Through research, Zayene discovers a method to bring the city back, and using his influence over Ivid, assembles an army to attack the city. (Lost City of Gaxmoor adventure) Gaxmoor may or may not be sent back to its demi-plane, based on PC actions. Iron League assembles party to assassinate Ivid, proceed with MoZ adventures.