Cao Pi footage
...he's using twin swords, not a double-ended blade
I'm not 100% on the clone thing I heard above though. There are two bars below the character's health, one for musou and one for what I assumed was the special attack. You can see Guo Jia do a attack that resembles one of his old moves, and it drains the second bar. However, in Cao Pi's footage, he performs an attack that looks to be part of one of his combo strings, wherein he plants both blades into the ground and ice shards shoot up at the surrounding enemies. This attack drained neither the Musou bar nor the second bar, but it seemed like a very Cao Pi flavored move. I can't imagine Liu Bei or Lu Xun performing it. So maybe there's more than just the two things I mentioned.
Also, I was happy to see a few officers actually roll dodging away from the player's attack in some parts of the footage I posted. Maybe the AI won't be entirely brain dead. Well, except for the peons. There is no hope for them.