ZGG had plans for extending Beagle storyline R. Iorio says

[Havard]

It would have been so cool if something more had been published. I really like the Fantasy/SF "genre-mash" elements.

Yeah, it would have been awesome.

What could have happened in the timespan between the discovery of the City of the Gods (DA3) and its final destruction?

Its certainly fun to speculate.

Wrath of the Immortals (now free on DrivethruRPG) expands on the storyline of the FSS Beagle, introducing a new crew member Rheddrian Benekander and his rival Ogdoban Treel. It also explains how the FSS Beagle ultimately was destroyed. Of course, this is Aaron Allston's vision and does not necessarily mesh with Dave Arneson's ideas, although it does not contradict any of Arneson's work.

There is also this fan idea:



I made this cover based on an idea by Cthulhudrew about a possible adventure that would involve a final showdown between Captain Bork Riesling (DA3) and St. Stephen.

-Havard