When mapping and creating my Warhammer map, I had envisaged this map extending further south to include the Southlands, particularly so that the Lizardmen modnation (MA Itza) would spawn a little more in its own territory, rather than at its very border as it does here.

I could have drawn it myself as an extension of the image I used for the background of the map outside of which it is, but the number of pixels in the file was already very high (and reducing it would decrease the graphic quality), which would have required me to recreate the same graphic art for the corresponding terrains.

On the other hand, to keep a zoom level consistent with the rest of the map, the enormous size of the Southlands requires a large number of provinces, whereas I have hardly any more names and concepts for provinces than those on the maps already published and much less zoomed in, and also requires more nations than just the Lizardmen ; yet no modnation for the Southlanders, or for the Beastmen of Southlands, has been published or announced, which is not surprising given the few of sources compared to other lands, factions, nations, or races in the world of Warhammer Fantasy.

In this case, even without going as far as the potential capital of the Lizardmen of Southlands (in Zlatlan), we would still have to cut the Southlands somewhere, in the middle of the jungle, at a point where the western and eastern parts are separated by the north-south mountain range ; and I would first have to map the southern coast of Araby, which already has too many provinces for a single nation. For all these reasons, I preferred to release this version of the map, without the Southlands, but with everything else I had planned.

I have no plans to create a map that includes a part of the Warhammer world that is not already present in this map, due to a lack of mod nations compared to the density of the Old World (which makes sense given the lore), little contact with the New World of Gold, at least that can be easily transposed into Dominions 6, due to the Great Ocean, which would require a large number of underwater provinces, as well as my level of knowledge of the Warhammer world, which is much lower than for the Old World and the Realms of Chaos.
Furthermore, with this zoom scale, there are already 708 provinces and up to 29 land nations (including all those from the Sombre Warhammer mod except Ulthuan and Naggarond).

Personally, I think that for those who want a map representing entirely and solely the New World of Gold, for example to have a game with the Lizardmen in Lustria for MA Itza, as well as the Dark Elves of MA Naggarond or even the High Elves of MA Ulthuan, the best and easiest solution would be to use one of the maps by Soaptastesok or the one by Of Anwyl:
https://gtm.steamproxy.vip/sharedfiles/filedetails/?id=3170273427
https://gtm.steamproxy.vip/sharedfiles/filedetails/?id=3175060391
https://gtm.steamproxy.vip/sharedfiles/filedetails/?id=3160856472
And possibly, in an additional version, transform all the provinces of the other continents and those of the Great Ocean that are not necessary, into “cave wall” and “cave look.”