It's a possibility that they COULD release english language DLC.
With Dynasty Warriors 7 the game came out in english in the US but Koei added a DLC to give it Jp voice overs.
What happens from here is all up to Koei, and I do hope they eventually release some english voice over DLC.
I'm not going to hold my breath though because Koei has dissapointed me several times in the last couple years.
50K - 7/25/11
AC Brotherhood - Forget Paris
I WILL PUKE BLOOD INTO YOUR SOUL!