Even as someone who doesn’t play Dynasty Warriors, this is pretty good news to me. Koei will be releasing the full Japanese voice-over track for the game as free DLC soon, as well as a few extra costumes. Hopefully this will pave the way for more publishers to do similar things with their localizations. There’s nothing wrong with more options, especially when dealing with dub versus sub issues. Considering how rabid some people are on both sides of that, more companies should embrace options like this.
Koei also mentioned that there will be paid DLC forthcoming, but no other details were released.