http://www.pcgamer.com/total-war-warhammer-2s-mortal-empires-campaign-will-contain-117-factions/

Total War: Warhammer 2’s mega campaign finally has a name: Mortal Empires. We’ve known about Creative Assembly’s plans to create a new campaign out of content from both the first game and its sequel since the game was announced, but a new blog post breaks down exactly what it’s going to look like. 

Mortal Empires will take the New World and the Old World, complete with their various races and leaders, and combine them to create a new map. It’s not quite as straightforward as squashing these huge maps together, though.