In addition to Kingdom Hearts Final Mix and Kingdom Hearts Re: Chain of Memories, Kingdom Hearts HD 1.5 Remix includes HD versions of the cutscenes from Kingdom Hearts 358/2 Days with additional voicing. Well, it looks like that's what Roxas voice actor Jesse McCartney is working on, so a localization appears to be on the way.
Square Enix has yet to announce anything formal, but McCartney posted a studio photo on Instagram saying, "For all you "Kingdom Hearts Fans. Recording the next chapter!" It's since been removed, but here's the image in question, via RPG Site:
Kingdom Hearts HD 1.5 Remix is due out on PlayStation 3 in Japan on March 14. Hopefully we'll hear official word on a western release soon.