So, as many of you probably know, in shogun 2 multiplayer a player will be able to take "retainers" along with his army. These effect the battles you play. They are like cards you can collect, each with a specific ability, that can give you an advantage over the enemy. For example the Bad Omen retainer, which will effect the enemy troops morale in a negative way.
Will these also be available in the singleplayer campaign?