[Update #2]: Total War: Warhammer 3's Update 3.0 will bring with it four brand new challenge missions - Trials of Fate.
[Update]: Total War: Warhammer 3 will be getting the brutally industrious Chaos Dwarfs on April 13th.
Given the sheer amount of factions you can play as or simply fight against, Total War: Warhammer 3's massive Immortal Empires combined campaign map is definitely the most exciting way to play the game. However, actually getting access to it has not been easy (or cheap) for most of Total War: Warhammer 3's existence.
Basically, in order to play on the Immortal Empires campaign map you needed to own Total War: Warhammer 1, 2 and 3, even if you don't plan on playing any of the older factions any time soon. And since each game costs 60€ outside of a sale, trying to get friends to pick it up and play with you was essentially impossible since very few people are going to be bold enough to drop €180 on a game mode they may or may not end up liking.
Thankfully, with today's update this madness has finally come to an end. Thanks to Update 2.4, everyone who owns Total War: Warhammer 3 now has access to the entirety of the Immortal Empires campaign, while the previous games and their DLCs will merely unlock those factions and legendary lords for you to play around with. It's pretty much the perfect solution, and the only complaint I really have is that it wasn't implemented months ago.
My little musings aside, Creative Assembly has also taken this opportunity to launch a brand new cinematic trailer featuring the various mortal races banding together to fight the coming darkness, as well as a brief teaser for the upcoming Chaos Dwarfs! Have a gander:
Besides all of the hubbub about Immortal Empires, Update 2.4 also brings with it a couple of small balance tweaks and quality-of-life improvements like fancier capes. You can check out the full list of changes over at the official website.
Once the Chaos Dwarfs get properly revealed, or Creative Assembly launches another major update, I'll make sure to let you know. Until then, have fun with Immortal Empires!