One thing I found when looking at the dlc in the steam store is
" Choose from two new difficulty levels: Easiest offers a leisurely cruise through the story, while Legendary could test the mettle of Cao Cao himself!"
Which ispretty interesting as ive seen people request both harder and easier difficulties.
Also I found this
" Train your favorite heroes from the Three Kingdoms era in the new Hall of Heroes building."
Which is kinda interesting. From what we’ve seen, its from the castle. It could be a campaign only building. But idk.