Stop wasting your time going back in time ala Rise of the Samurai and catapult yourself into the future where Tom Cruise teams up with the last samurai....wait wrong thing
Ok basically in March, Sega is going to release a standalone Shogun 2 game called Fall of the Samurai situated roughly 400 years after the Sengoku period where the future of Japan is uncertain as old time Warlords clash with the Foreign influenced Emperor
http://www.totalwar.com/shogun2/fall-of-the-samurai
Theres going to be a lot of new things like gatling guns, offshore artillery, port battles, and foreign units