Is this in any way related to Koei's Samurai Warriors stuff? I know that they're historical characters and everything, but I'm only familiar with the games and my knowledge of them is little at best xD

As far as I know, Koei has Nobunaga as their Japanese version of Cao Cao and Ranmaru as shotabait xD I'm a Dynasty Warriors dork so I have some Musou sites I can rummage around if you like~~