It's completely possible to send Karl Franz to conquer the High Elven realm of Ulthuan now or raid the Dark Elven lands with Grimgor Ironhide and his Black Orc hordes. The awesome thing about a map spanning both the Old World and the New World is that you can now wage wars with factions that previously were cut off from each other. The map itself is ludicrously large and detailed, with a wide variety of locales keeping the backdrops of your wars nice and varied and fans of the lore will recognize many places and factions from the tabletop's fluff. The Mortal Empires campaign also adds some of the new mechanics from 2 to the campaign, meaning that Old World races will now also have access to treasure hunts and the trait system that gives your Lords flat bonuses depending on their performance on the battlefield.

So what's the Mortal Empires campaign about? It's about doubling the size of the landmass available to explore and conquer by smashing together the Old World map (from Total War: Warhammer) and the New Word map (from Total War: Warhammer 2) to form one gigantic landmass with an alarming number of towns, cities, and factions.

Mortal empires map size