Gnomeregan is present and accounted for in 4 of our 6 bookmarks! It was formed around -170 BFFW. and should show up starting in War 1, with the last gnomish king in -370 BFFW.
This all reminds me btw, as some of you may know, Ck2 does not like negative dates in the scripts, at all. So to work around this we'll be using an offset. I took some time earlier on in the design to figure out what would work best. In my mind the "year 0" for something in universe would have to be something that would not only be significant but also something that isnt within a few decades of the "present year" for those living in the universe. Surely all those people had a dating system before the orcs invaded. So to give us enough room to work all the cool pre-RTS events in as well as give us extra room to grow if we so choose, I picked the obvious selection in the history of the world as we know it: The Sundering.
With The Sundering set as a Year 0, that removes all the negative dates and gives us a much more script friendly dating system:
The Arathi-Troll War: Year 7,200
The War of Three Hammers: Year 9,770
The First War: Year 10,000
The Second War: Year 10,005
The Third War: Year 10,020
The Age of Adventurers: Year 10,025
I might be wrong, but don't EU4 and CK2 and (list of other Paradox games here) all have problems with dates bigger than 4 digits?