I left spaces in the newsprite text for the Alexander generals and the different Samurai from the Magnificent scenario, in case someone wanted to add them. Right now, I don't know how the AI is taught to use them. I also don't know about buiding them either.
I think that the generals are something better fitted to scenarios, but I left the option open in case we figure something out. If someone wanted to jump in and make this their pet project, then more power to you. There are certainly enough areas of the game for people to take an interest in developing.