Southlands - 48 Settlements in 15 full Provinces plus 1 Forest, 1 Black Pyramid of Nagash & the Great Desert of Araby Khemri and Araby are difficult to separate so I've just thrown them together with Lahmia and the rest of the Southlands. The Empire (including Sylvania & Marienburg) - 51 Settlements in 15 full Provinces plus 3 Empire Forts, 2 Forests, Mootland & Brass Keep

The Grey and Black Mountains would add 4 more Provinces with 12 Settlements, making the Karaz Ankor the biggest Kingdom. Naggaroth (not including Chaos Wastes) - 56 Settlements in 17 full Provinces plus 1 Forestīadlands & World's Edge Mountains - 54 Settlements in 17 full Provinces plus 1 Forest It would be impossible to separate these areas without causing a Grudgin', a Waaagh! or both, so I didn't bother. Lustria - 57 Settlements in 20 full Provinces plus 1 Forest I've added the number of Settlements and sorted the list for visibility.

If you have never played a Total War game the wait between turns could be a downer for you.Edit: u/Jejinak made a count of settlements using the Sea Lanes map. There are just a ton of factions on that huge map for the AI to try to run through every turn. Although the faction specific win conditions are new to Total War, Mortal Empires time between turns while the AI is thinking is still long and annoying. I suggest you start with the Vortex campaign. They will be on the map to fight but you cannot pick them to play. So if you do not own Warhammer 1 and its DLC factions, you will NOT be able to play them. However the only factions playable on the Mortal Empires map are ones you own. Just overall level of domination across the whole map. No special 'story' type win conditions for specific factions like the Vortex campaign. It is a traditional sandbox style Total War game. The Mortal Empire campaign is mashed together map of Warhammer 1's map and the Vortex map. Each playable factions on this map have a special win condition, ie control the vortex, collect faction specific artifacts.It is the main campaign for Warhammer 2 more or less. Plan and simple the Vortex campaign is it's own map with the new playable factions.

Mortal empires map vs old world map