Dynasty Warriors/WMG

Koei-Tecmo will soon spin off the Warriors series to include the American Civil War
An entry from the Dynasty Warriors YMMV page gives an interesting take on this: "Imagine if you will a similar game based on the American Civil War, where you get to play as Robert E. Lee, Stonewall Jackson, Nathan Bedford Forrest, Ulysses S. Grant, and William Sherman as gun-toting badasses, and Abe Lincoln gets reimagined as leading from the battlefront wielding twin laser-sighted M1s. Then imagine the game based not on the actual history, but on a unashamed rule of cool romanticized novelization of the history, written in 2850 A.D. (i.e. a thousand years after the historical events have passed into oral legend). Then, imagine that instead of two sides, there are three (North, South, and WEST!) and instead of 5 years or so, it lasts 100..."

More realistically, Koei-Tecmo can slightly romanticize the events of the American Civil War for the sake of a video game. Though the mentions of slavery could be a sensitive subject, especially in a video game, it is a central theme of the war to begin with, Possible names for the game: Koei has already spun off the Warriors series to include the Warring States period of Japan, the Hundred Years' War, the Trojan War, as well as a series with Gundam, One Piece, and Fist of the North Star. The American Civil War is the next obvious step from here...
 * Civil Warriors: America
 * Dynasty Warriors: America
 * The Japanese name of the game would be 南北戦争無双 (nanbokusensoumusou, literally "American Civil War Unmatched/Musou")

If there is DW8, Shu will receive a lot of Token Evil Teammate
Come on, as if this isn't obvious enough. They could add in either Mi Fang or Fu Shiren (the two dudes who betrayed Guan Yu and caused his eventual downfall), though as they try to make this World of Woobie, the two can receive more positive treatment and end up like Jerkass Woobie. Aside of that, since Jin is on the fray now, they can also add Huang Hao, who'll rival Dong Zhuo in terms of Complete Monster-dom (in a way of Evil Chancellor than Evil Overlord), probably lifting some crazy things given to Jiang Wei in 7, as well as making even Zhong Hui be completely disgusted at him.

DW 8 Character speculation

 * Zuo Ci, again.
 * But he will be more balanced. If balancing won't work out, then...
 * A fictional, young counterpart.
 * Who is trying to prolong the chaos, and is as underpowered as Zuo Ci was overpowered.
 * China
 * And he'll be known by his human name, Wang Yao, use twin daos (Gan Ning's weapon from 3 to 5) and be something of a fragile speedster.
 * Cao Hong
 * Was historically a Jerkass who belittled his fellow officers while trying to make himself look good. He's prime Token Evil Teammate material because of this, and could be an excellent Foil to Cao Ren, whom he was constantly seen with in earlier games. In order to make him somewhat likable, he could have a strong connection to his family: in the novel, he rescued Cao Cao, even after he threatened to execute Hong for screwing up against Ma Chao.
 * Liao Hua
 * Lived to see the founding and end of Shu. Was second-of-command during Jiang Wei's campaigns. His Musou Mode could consist of him being nervous about living up to the standards his predecessors established.
 * Yu Jin
 * One of Wei's Five Elite Generals. Surrendered to Guan Yu at Fan Castle, and actually died because he was so ashamed of doing so. His Musou Mode could include him defying the events of the novel and going on to redeem himself.
 * Yue Jin
 * The last of Wei's Five Elite Generals. A pretty constant presence in the games. Defeated Guan Yu at the battle of Chi Bi. Teamed with Zhang He to attack Sun Quan at the battle of He Fei.
 * Li Dian.
 * His uncle was killed by Zhang Liao, which was actually mentioned in 7: Xtreme Legends. His Musou Mode could consist of him defending Zhang Liao, showcasing his reputation of being a dedicated soldier who put duty before all else, including grudges and glory.