I'm sure they'll dub it, but I would hope they have the option to switch it back to Japanese. I hate to sound like one of "those people" but I've watched the entire series in Japanese and I'm just used to it.
haha, I'm one of those people. If they have japanese audio, it will be awesome. When I first played Valkyria Chronicles, I just played it and it automatically chose english for me. Put it down for like one year and picked it up again and noticed I could change it to japanese audio. Played it straight through and beat that game. It just felt so much more serious. Great game.